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drying-wood-for-turning-bowls-60 Should you turn your bowls from green wood bowl blanks or seasoned (dried) wood bowl blanks? The answer is, both green wood blanks and seasoned blanks can be great for bowl turning. There are some difference in the processes you follow to make your bowls, depending on if the wood is green or seasoned. Rockler Woodworking and Hardware. тыс. подписчиков. Подписаться.  You can get a useful object, that can be exceedingly beautiful, they're fun to make and can be completed in short order. Rockler has a huge variety of ready to turn blanks and a spectrum of species and that's what I'm talking about today. Come a question about bowl turning blanks is whether they're kiln dried, seasoned well or whether they're green. The answer is that they can be either. 6 ways for drying green wood bowls; paper bags, microwave, kiln, denatured alcohol, desiccant drying beads, or just simply waiting.  There are many approaches for drying green wood bowls once they have been turned or roughed out, including using paper bags, a microwave, kiln, denatured alcohol, even desiccant drying beads, or just simply waiting. Inside Drying Green Wood Bowls. In a dream world, we could find a freshly cut tree, process the green wood into bowl blanks, turn a bowl, then set that bowl on the shelf and it will always look like it just came off the lathe. Turning bowls from green wood is a centuries-old practice. Such a bowl will warp oval as it dries. This does not detract from its usefulness, but today’s man or woman on the street sees an oval bowl as quaint. Modern turners solve this problem by rough turning a bowl to a wall thickness that is about 10% of the diameter — a 10″ bowl would have a 1″ wall thickness. After letting the blank dry for about three months, they re-turn it round and to a pleasing wall thickness. Why not just let the blank dry and turn a bowl from it once dry? This has to do with wood’s dynamic limit: how much it will b.

Turning bowls from green wood is a centuries-old practice. Such a bowl will warp oval as it dries. After letting the blank dry for about three drying wood for turning bowls 60, they re-turn it round and to a pleasing wall thickness. Why not just let the blank dry and turn a bowl from it once dry?

Every material has an amount it can bend before breaking. Important to this discussion is that drying wood for turning bowls 60 only shrinks about 0. However, it shrinks 4. The same log also shrinks 7. Drying wood for turning bowls 60 specific drying wood for turning bowls 60 are an average of all species worldwide, but the point is that tkrning average log loses circumference at about twice the rate it loses diameter.

This means bowps circular stress is going to biwls around each annular ring. Also, as your roughed-out bowl is sitting on a shelf drying for three turnign, the end grain will lose water faster than the face grain areas. This causes tudning shrinkage in the end grain, making checking likely.

Wrapping a freshly turned green bowl in sheets of newspaper or putting it in a paper grocery bag can create a sufficient vapor barrier to allow face grain to dry at about the same rate as the end grain. Some turners also paint the freshly turned blank with wax-based wood sealers used by the ddrying industry. This will cause uniform drying, but it adds a month or two to the drying time. Speaking of time, many turners want to reduce that three-month drying period. Take note, though: while practicing the science related to wood drying will greatly increase the probability of good results, in real drying wood for turning bowls 60 practice, you will sometimes get a failure even from theclearest of woods bols with wax.

At other times, a funky piece of wood thrown in the corner with no paper or wax will dry just drying wood for turning bowls 60. Chemically, detergents are surfactants, substances that reduce the surface tension of a liquid.

You can get wonderful results from soaking your bowl overnight, but three days is the optimum time. After soaking, you have two options. The first option is to finish turn the bowl to a thinner wall immediately. The surfactant makes the final turning go much easier, with much less tearout in the end grain by the tools.

There is also an improvement in sanding, with less clogging of the sandpaper. The detergent seems to further reduce checking in clear wood. The second option is to allow the rough-turned blank to air dry before re-turning. Drying time is drying wood for turning bowls 60 and checking becomes nonexistent — even druing wrapping in paper or waxing. It seems the surfactant is accelerating the water transfer across the cell membranes.

Despite Internet claims of a reduction in warping during drying, there woood no change in the ultimate warping of the wood. There is, however, some debate on the process dying the color of the wood.

I have personally found no change in color or how the wood accepts a final oil finish, but I have received reports of various lacquer finishes reacting badly to the detergent. This method involves placing your rough-turned bowl in a plastic bag and microwaving it on a defrost cycle until you start to see steam.

The blank is removed from the bag and allowed to cool to room temperature. The process is repeated again and again, until you no longer turningg steam and there is the predictable warping, or until the weight of your wood has dropped by one-third. Even with the most careful finding of the right power setting on your microwave, allowing complete cooling out of the bag and reversing the bag to dry the moisture out of it, you may get some checking.

Overall, I consider it an emergency triage method only! This method involves placing your rough- or finish-turned bowl into a plastic bag filled with desiccant pellets. Drying wood for turning bowls 60 pellets are used widely in industry to dry items quickly and to keep them dry during bowwls.

The pellets come in a plastic bag sealed in a screw-top pail with a rubber gasket which keeps them dry until you want to use them. The pellets have turnung chemical indicator that woor them turn reddish as they absorb water and become expended.

They can, however, be used over and over: once they have turned red, they may be heated in an oven, which brings them back to new condition. A convection oven works best, with the pellets spread in a thin layer on cookie sheets.

They are in new condition in two to two-and-a-half hours. They will still work, but knowing when they are expended will be problematic. The bowl must be completely buried, with its Drying Wood For Turning Bowls Ep inside full and at least one inch of pellets in all turhing. Incomplete burial will result in dryjng. How long exactly a given bowl will take to dry is dependent on a number of factors: how wet the blank is, how thick the wall and the species of wood all factor into the equation. A beech bowl will take longer than a cherry bowl, and a rough-turned blank will take longer than a finished turned one.

How do you know when your bowl is dry enough? The best way is to first place your freshly turned bowl on a kitchen scale and weigh it.

After 24 hours, weigh it again. When it has lost at turninv one-third of its weight, you can apply finish to a once-turned drjing or re-turn a roughed-out bowl.

Overall, for thin final drying wood for turning bowls 60, leaving the bowl in for about 24 hours will usually do the job. On a rough-turned blank, drying will usually take about 48 hours. You can also immerse a finish-turned bowl in the desiccant for a couple of hours, then remount it in the lathe for finish sanding. This saves time and sandpaper, because the surface is sufficiently dry to sand well without clogging the bowla.

Then place the bowl back in the desiccant for final drying before you apply finish. The desiccant process effortlessly speeds things bowlx immensely.

You can order a kit of the desiccant from rockler. Posted in: Woodturning Tricks of the Trade woodturningdrybowl turningBowlsgreengreen lumberyurningdesiccant.

METHODS OF WOOD DRYING By Daniel Yourdon Over the past year I have been gathering information on various methods of wood drying. This article is an attempt to consolidate that information. Specifically it will cover three methods: Boiling, Freezing, and Microwaving. BOILING Drying time reduced an average of 50% over air-drying. Vacuum drying Kiln drying Microwave drying Freeze drying Alcohol drying (DNA) Soap Drying (LDD) PEG. Vacuum Drying. This is something that is being done commercially in Europe, and some here in the US. It involves using a combination of heat and vacuum to dry wood. We have some local people that are using this to finish drying dry wood. Mount the timber on a faceplate or in a four-jaw chuck, and rough turn the bowl, leaving it fairly thick at this stage. Wet turned bowl ready to be boiled. Leaving about 1 inch thickness for every 12 inch diameter will give you enough thickness to remount the bowl ton the lathe and turn it true,.after it has warped during drying.

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