Resin pockets. Resins

Resin pocket - the very name of this defect explains its nature as a certain void or cavity formed between the layers in coniferous wood and filled with resin. In addition to the fact that such a defect reduces the strength of the wood, it also makes working with it more difficult because the resin envelops and contaminates the tool. Serious difficulties arise in connection with this defect in the finishing of products - sanding, painting, impregnation.

Grinding - a consequence of injury to a coniferous tree trunk. The defect is expressed in the impregnation of all the wood at the site of this injury with resin. The color of the tarred area is darker than the surrounding wood. The wood at the site of tarring is much heavier than the base wood and is of little use for carving. The strength of the wood at the site of tarring is significantly weakened.

Crayfish on a tree: 1 - crayfish on a tree 2 - section

Cancer - disruption of wood tissue on the surface of the trunk with penetration deep into the middle of the trunk, resulting from infection by parasitic fungi and bacteria. In coniferous species, along the borders of the infected area, abundant gumming occurs. At the same time, throughout the entire period of the disease, wood does not grow in the affected area, the affected area does not heal, but on the opposite side, as if to compensate for the loss, due to increased growth, a peculiar swelling (tumor) is formed, characteristic of this defect. Such wood, as you can already understand, is not suitable for carving. After cleaning the wood from the affected fibers, the remaining part can be suitable for the manufacture of decorative sculptures and other decorative products used in the design of both interiors and exteriors.

The interior, made of natural wood, looks very solid, presentable, soft and pleasant. Coniferous material is especially valuable, which also, during operation, contributes to the natural health of all residents of the house. But there is one problem that arises when laying coniferous wood - how to get rid of resin on the boards, which must be solved correctly. How to remove resin from wood in a pine bath or steam room? This is exactly what this article will be about.

Why remove resin?

Coniferous wood species such as pine, spruce, and larch are extremely beautiful, but they emit natural resins not only after cutting, but also during growth. This resin is a very viscous, fluid substance, so the process of interior finishing becomes significantly more complicated, because:

1. The boards where the resin leaks out become extremely sticky and quickly adhere to any tools or materials they come into contact with.
2. Typically, the places where the “resin” leaks out look somewhat darker than the entire board, so a uniform coating cannot be achieved.
3. It is impossible to perform staining while the substance is leaking, and it is also unprofitable. Paint or varnish will not harden on resin stains, and accordingly, convex areas of the coating, unprotected from the harmful effects of moisture, will remain, standing out with their color.

What you need to know about resin?

It is best to remove resin only after the board has been sanded. Although compliance with this rule will not be a guarantee that the “resin” will not manifest itself again. Sometimes such a substance begins to ooze under the influence of certain factors after finishing work has been completed. This factor must be taken into account before choosing coniferous finishing for your home.

How to remove resin from a board?

In order to correctly prepare all the elements for laying the floor, wall covering or ceiling, you need to properly get rid of the resin on the boards. This can be done in several ways.

Mechanical removal

In this case, in order to remove the resin from the boards, you must wait until the fluid mass has completely hardened. Then, armed with a knife, remove each piece by hand.

Important! After removing all unwanted deposits, it is necessary to sand the surface of the wood with sandpaper or a special tool.

Solvents

To dissolve the “resin”, you can also use available chemicals. The following tools are suitable for this purpose:

• alcohol;
• White Spirit;
• turpentine;
• refined gasoline;
• acetone;
• nitro solvent.

Important! The use of any of these solvents does not affect the structure and shade of coniferous wood. But when using it, it is advisable to protect yourself with gloves and a respirator so that caustic volatile vapors do not provoke irritation of the skin and mucous membranes.

Other ways and means

You can also get rid of resin on boards using traditional methods, which involve using available kitchen and pharmacy solutions and powders.

The following methods effectively help solve the problem:

• Ammonia or ammonia solution. This product is diluted with acetone in a ratio of 2:1. Apply to the surface with rubbing movements until foam forms. Remains of foam and resin are removed after 20 minutes with a clean damp cloth.
• Potash and soda in equal proportions (50 g each). Both substances are mixed and poured into 1 liter of hot water. To enhance the effect, you can add 250 ml of acetone.
• Caustic soda. It is dissolved in half a liter of cold water. You can also add 250 ml of a solvent such as acetone.

Important! Any of these products can only be applied to a sanded, but not painted surface. Otherwise, the acetone will dissolve the paint and the finished finish will not look the most attractive.

Safe recipes

In order not to damage the wood either by mechanical or chemical influence, or in the case of a small amount of “resin”, use the following means to get rid of resin on the boards:

• 25 g of wood or any liquid soap mixed with 50 ml of ammonia and 1 liter of hot water;
• acetic solution of concentrated acid and water in a ratio of 1:50.

Important! The latter remedy is also good for removing alkali residues after using any other substance or solution in order to get rid of resin on boards. It helps a lot, including when you are washing finished walls and you need to remove cleaning residue from the joints of the crowns.

When the walls are already covered

If the resin began to appear from the boards after they were laid on the walls, you are unlikely to have the desire to spend a lot of time precisely removing each piece of “resin” with solvents or a knife.

In this case, you can burn through all the places where pine sap is formed with a blowtorch, then sanding them with sandpaper of a suitable grain size.

Video material

When giving preference to coniferous boards, remember that you will not be able to completely get rid of resin on the boards. It can appear at any moment, the most unexpected for you. But this is actually not such a global problem, because the “resin” can be removed, and the beauty, environmental friendliness and benefits of such wood cannot be compared with any modern plastic or other material. Let your home be filled with only the pleasant aroma of pine needles and always look cozy. And now you know how to deal with minor resin problems.

Resin pocket(4.7), A cavity inside the annual layer filled with resin (Fig. 20). It is observed on tangential surfaces in the form of oval flat depressions, on radial surfaces - in the form of narrow longitudinal slits, at the ends - in the form of short arcuate cavities. Found in wood, conifers, especially spruce.

1 -- radial section; 2 -- tangential section. 2 -- end cut.

Rice. 20. Resin pocket (spruce)

Single-sided resin pocket(4.7.1). Resin pocket, opening on one or two adjacent sides of the assortment.

Through resin pocket(4.7.2). Resin pocket facing two opposite sides of the assortment.

Impact on quality.

The resin leaking from the resin pockets spoils the surface of the products and interferes with their front finishing and gluing. In small parts, resin pockets can reduce the strength of the wood.

Measurement

Resin pockets are measured by depth, width and length (in linear measures or fractions of assortment sizes) and by quantity in pieces:
• in lumber products - by 1 m length or the entire side of the assortment;
• in veneer - by 1 m 2 or the entire sheet area. It is allowed, if this is due to the specifics of the assortment, to measure one or two of the specified parameters.

Core(4.8). (Invalid term, hereinafter referred to as NDP. Core tube). The narrow central part of the trunk, consisting of loose tissue. It is characterized by a brown or lighter color than the surrounding wood. At the ends of the assortment it is observed in the form of a small (no more than 5 mm) spots of various shapes, on radial surfaces - in the form of a narrow, more or less straight strip.

Impact on quality

Assortments with cores crack easily.

Measurement

Counted by presence on the side surface. In lumber products, if this is due to the specifics of the assortment, it is allowed to measure the depth of the core, counting from the nearest side surface (in linear measures or fractions of the assortment dimensions).

Double core(4.9). The presence of two cores in the assortment (Fig. 21). In round timber it is observed at the upper ends in the form of two cores with independent systems of annual layers, surrounded on the periphery by one common outline, and is characterized by an oval cross-section of the assortment; in sawn products - on radial surfaces in the form of two narrow ones located at an angle to each other strips of cores, at the ends - in the form of two independent systems of annual layers.

Rice. 21. Double core in a board (pine)

Impact on quality

It makes processing (sawing and peeling) of wood more difficult and increases the amount of waste. Double-core varieties crack easily.

Measurement

In round timber, the presence of defects is taken into account. In sawn products and veneer, the length of the defect along the assortment is measured (in linear measures or fractions of the assortment size).

When working with coniferous wood, it sometimes becomes necessary to seal resin pockets.Basically, old masters correct this wood defect by puttying. They clean out the resin cavity with a spatula or the tip of a knife and fill it with putty. But this is not the best sealing method. The resin still comes out sooner or later. Sometimes the insert is made manually, adjusting its shape to the shape of the pocket. This method is good in isolated cases. Some manage to drill out small pockets and

But technology. Science is moving forward by leaps and bounds. And it would be surprising if a person who flew into space, discovering many things that we could not dream of just a few decades ago, could not come up with a way to seal resin pockets.

And this method exists. It consists of removing a resin pocket using a special hand cutter and installing a factory-made insert into this profile.

Sampling is done to different depths, depending on the size of the resin pocket. Some carpenters even manage to save on this. They use one insert for two pockets - small and large.

Then glue is given into the selected groove (let's call it that) and the insert is inserted. Time is given to dry and the insert is cut or sanded, depending on the height to which it protrudes above the surface of the part.

Carpenters call these inserts boats because of their shape, which actually resembles a boat.

I saw smerek and pine boats. But there are also birch, and beech, and oak. The last three types are used to seal small cracks in wood of the corresponding species.

The benefits of fixing it this way are obvious. The milled groove ideally matches the shape of the boat insert, and by selecting the boat according to its structure, we achieve complete, or almost complete merging of the insertion site with the surrounding background. After grinding, the insertion site does not even require putty, the seal is so high quality.

The problem is the lack of cheap machines and cutters for this operation on the market, as well as the difficulty in purchasing a small number of boats. After all, it’s not every day that simple, ordinary carpenters have to seal resin pockets. But these same machines are also designed for joining parts into so-called lamellas (with a different cutter). But we will talk in detail about the methods of joining carpentry parts in a separate article. In the meantime, they bring me boats, as well as knots, from the Czech Republic, Slovakia, or Hungary.

This is interesting to know. The Czechs call the machine for milling resin pockets “lodichkarney”, or “lodichkovachka”.

The video shows how a resin pocket is sealed with a so-called boat. Pay attention to the nail file that I use to cut down the protruding part of the boat. I have never seen such files on sale here, but you can make them yourself. It is very easy to use and not difficult to manufacture. If you can’t make a nail file that flips to different sides, make it on one side, which is more convenient for you. If you need a more detailed description, please let me know and I will answer.

P.S. In the video I cut off the boat immediately after inserting it into the nest. In fact, you first need to give it time to dry, and only then cut off the rest.

On a tangential cut it looks like a flat oval depression, on a radial cut - like a narrow longitudinal slit, on the end - like a short arched cavity, accompanied by a slight bend in the annual rings adjacent to the outside of the trunk. Along the trunk, the length of the resin pocket is slightly greater than around the circumference. In the lateral direction it can be up to 10 cm long and up to 7 mm deep.

The number of exposures to the surface of the material varies unilateral And through resin pockets. A one-sided resin pocket extends onto one or two adjacent sides of the lumber or piece; through - on two opposite sides.

Emergence

Resin pockets are characteristic especially of spruce. They are also found in the wood of pine, Siberian cedar and larch. The cause of their occurrence is considered to be damage to the cambium due to the swaying of the tree by the wind and overheating of trees growing on the edge, where resin pockets are especially common.

A large number of pockets indicates poor connection between the annual layers and may be accompanied by peeling cracks. The abundance of resin pockets in the upper part of the trunk can be caused by a type of tree tar cancer - seryanka, caused by the fungi Cronartium flaccidum and Peridermium pini.

Impact on wood quality

The contents leaking from the resin pockets spoil the surface of the products and interfere with their external finishing, lining and gluing, and stain the tools. Reduces the grade of small high-quality lumber and plywood. In small parts, resin pockets can reduce the strength of the wood. The strength of large parts is slightly affected.

When wood is heated, resin can leak out of the pockets even years after the part is made, seeping through the oil paint.

When making carpentry, the resin from the pockets is removed and replaced with putty.

Measurement

In lumber, resin pockets are counted by the number of pieces per 1 m of length or on the entire side of the assortment, the largest of them are measured by length, width and depth. In veneer, the width and length are measured and the number of pockets per 1 m2 or per entire sheet is taken into account. It is allowed to measure one of the specified parameters if this is due to the specifics of the assortment.

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Notes

see also

Literature

• Defects of wood. - Ed. second, revised and additional - M.: Lesn. industry, 1980. - 197 p.
• Vakin A. T., Poluboyarinov O. I., Solovyov V. A. Album of wood defects. - M.: Lesn. industry, 1969. - 165 p.
• Defects of wood. Album / Miller V.V., Vakin A.T.. - M. - L.: Catalogizdat NKTP USSR, 1938. - 171 p. - 3500 copies.
• Pockets // Forest Encyclopedia / Ch. ed. Vorobyov G.I.; Ed. Col.: Anuchin N.A. et al.. - M.: Sov. encyclopedia, 1986. - 631 p.

Links

• . www.complexdoc.ru. - Visible wood defects. Classification, terms and definitions, methods of measurement. Illustrations. Retrieved April 22, 2013. .
• . Glossary.ru. Retrieved April 24, 2013.

An excerpt characterizing the Tar Pocket

When the doors of the booth opened and the prisoners, like a herd of sheep, crushing each other, crowded into the exit, Pierre made his way ahead of them and approached the very captain who, according to the corporal, was ready to do everything for Pierre. The captain was also in field uniform, and from his cold face there was also “it,” which Pierre recognized in the words of the corporal and in the crash of the drums.
“Filez, filez, [Come in, come in.],” the captain said, frowning sternly and looking at the prisoners crowding past him. Pierre knew that his attempt would be in vain, but he approached him.
– Eh bien, qu"est ce qu"il y a? [Well, what else?] - the officer said, looking around coldly, as if not recognizing him. Pierre said about the patient.
– Il pourra marcher, que diable! - said the captain. – Filez, filez, [He’ll go, damn it! Come on in, come on in] - he continued to say, without looking at Pierre.
“Mais non, il est a l"agonie... [No, he’s dying...] - Pierre began.
– Voulez vous bien?! [Go to...] - the captain shouted, frowning angrily.
Drum yes yes dam, dam, dam, the drums crackled. And Pierre realized that the mysterious force had already completely taken possession of these people and that now it was useless to say anything else.
The captured officers were separated from the soldiers and ordered to go ahead. There were about thirty officers, including Pierre, and about three hundred soldiers.
The captured officers, released from other booths, were all strangers, were much better dressed than Pierre, and looked at him, in his shoes, with distrust and aloofness. Not far from Pierre walked, apparently enjoying the general respect of his fellow prisoners, a fat major in a Kazan robe, belted with a towel, with a plump, yellow, angry face. He held one hand with a pouch behind his bosom, the other leaned on his chibouk. The major, puffing and puffing, grumbled and was angry at everyone because it seemed to him that he was being pushed and that everyone was in a hurry when there was nowhere to hurry, everyone was surprised at something when there was nothing surprising in anything. Another, a small, thin officer, spoke to everyone, making assumptions about where they were being led now and how far they would have time to travel that day. An official, in felt boots and a commissariat uniform, ran from different sides and looked out for the burned-out Moscow, loudly reporting his observations about what had burned and what this or that visible part of Moscow was like. The third officer, of Polish origin by accent, argued with the commissariat official, proving to him that he was mistaken in defining the districts of Moscow.
-What are you arguing about? - the major said angrily. - Whether it’s Nikola, or Vlas, it’s all the same; you see, everything burned down, well, that’s the end... Why are you pushing, isn’t there enough road,” he turned angrily to the one walking behind who was not pushing him at all.
- Oh, oh, oh, what have you done! - However, the voices of prisoners were heard, now from one side or the other, looking around the fire. - And Zamoskvorechye, and Zubovo, and in the Kremlin, look, half of them are gone... Yes, I told you that all of Zamoskvorechye, that’s how it is.
- Well, you know what burned, well, what’s there to talk about! - said the major.
Passing through Khamovniki (one of the few unburned quarters of Moscow) past the church, the entire crowd of prisoners suddenly huddled to one side, and exclamations of horror and disgust were heard.
- Look, you scoundrels! That's unchrist! Yes, he’s dead, he’s dead... They smeared him with something.
Pierre also moved towards the church, where there was something that caused exclamations, and vaguely saw something leaning against the fence of the church. From the words of his comrades, who saw better than him, he learned that it was something like the corpse of a man, stood upright by the fence and smeared with soot on his face...
– Marchez, sacre nom... Filez... trente mille diables... [Go! go! Damn it! Devils!] - curses from the guards were heard, and the French soldiers, with new anger, dispersed the crowd of prisoners who were looking at the dead man with cutlasses.

Along the lanes of Khamovniki, the prisoners walked alone with their convoy and carts and wagons that belonged to the guards and were driving behind them; but, going out to the supply stores, they found themselves in the middle of a huge, closely moving artillery convoy, mixed with private carts.
At the bridge itself, everyone stopped, waiting for those traveling in front to advance. From the bridge, the prisoners saw endless rows of other moving convoys behind and ahead. To the right, where the Kaluga road curved past Neskuchny, disappearing into the distance, stretched endless rows of troops and convoys. These were the troops of the Beauharnais corps who came out first; back, along the embankment and across the Stone Bridge, Ney's troops and convoys stretched.