Tell us about yourself!

Complete Your Profile
  • agelbert commented on Ryo Kosaka's instructable Bending Plywood With 3D Printer6 days ago
    Bending Plywood With 3D Printer

    You are most welcome. I forgot to mention that the old time fishing boat builders in the Northeast of the USA would actually ask the people from town to "donate" urine! They needed a lot of it to immerse the planks completely. LOL! I don't know what the ammonia concentration is in human urine. I assume you can Google it, but it probably is a weak solution. You probably do not want too much ammonia oversoftening the wood, of course. At any rate, being able to soften and bend wood at room temperature will ease your work. Here's an abstract from an article about softening wood with ammonia:Wood Softening and Forming with AmmoniaM. BARISKAInstitut fur Microtechnologische Holzforschung, Eidgenossische Technische Hochschule, CH 8006 Zurich, SwitzerlandC. SCHUERCHDepartment of Chemis...

    see more »

    You are most welcome. I forgot to mention that the old time fishing boat builders in the Northeast of the USA would actually ask the people from town to "donate" urine! They needed a lot of it to immerse the planks completely. LOL! I don't know what the ammonia concentration is in human urine. I assume you can Google it, but it probably is a weak solution. You probably do not want too much ammonia oversoftening the wood, of course. At any rate, being able to soften and bend wood at room temperature will ease your work. Here's an abstract from an article about softening wood with ammonia:Wood Softening and Forming with AmmoniaM. BARISKAInstitut fur Microtechnologische Holzforschung, Eidgenossische Technische Hochschule, CH 8006 Zurich, SwitzerlandC. SCHUERCHDepartment of Chemistry, S.U.N.Y. College of Environmental Science and Forestry, Syracuse, N.Y. 13210"AbstractDuring sorption, softening and forming processes in woodwater-ammonia systems, changes occur on molecular to macroscopic levels . They are time-dependent and history-dependent functions of temperature, pressure, and system composition, and require definitionin terms ranging from molecular interactions to engineering properties. The influence of ammonia is comparable to but more extreme than that of water. At room temperature its effect is comparable to the effect of water alone at 200° C. In general the rate of diffusion of ammonia in wood is much faster than water; bound water is displaced by ammonia since ammonia sorption is more powerful; the fiber saturation capacity of the wood is much higher for ammonia; the wood can be more highly swollen. Ammonia-treated wood is less elastic and can undergo plastic flow and creep. The wood tends after drying to be more dense but less dimensionally stable. The processing characteristics and final properties of ammoniatreated wood cover a wide range depending on treatment conditions. At various stages of development are rapid ammonia treatments for wood forming, with results comparable in effect to steam bending (Zurich), modification of wood properties by compression (Riga), defiberization and pulping, wood slicing, adhesion of particles in molding, and applications in arts and crafts."http://pubs.acs.org/doi/abs/10.1021/bk-1977-0043.c...Good luck to you.

    View Instructable »
  • agelbert commented on Ryo Kosaka's instructable Bending Plywood With 3D Printer1 week ago
    Bending Plywood With 3D Printer

    This is a very impressive and worthy process. I'm sure that many beautiful items can be made using your technique. There is only one thing I would suggest to make your work somewhat easier. Please consider applying an ammonia solution to the wood piece to be bent. This is an old method used by boat builders with to work some fairly thick wooden planks which cannot be bent as easily as thin sheets of plywood.. In fact, if you don't mind some temporary strong odors (which you can wash off after the wood has been shaped), your own urine will work well to soften the wood.The way the boat builders do it is to immerse the wood sheet or plank in a dilute ammonia solution until it is saturated. This makes the cellulose easily bendable without splitting. Then they remove the wood and place it a...

    see more »

    This is a very impressive and worthy process. I'm sure that many beautiful items can be made using your technique. There is only one thing I would suggest to make your work somewhat easier. Please consider applying an ammonia solution to the wood piece to be bent. This is an old method used by boat builders with to work some fairly thick wooden planks which cannot be bent as easily as thin sheets of plywood.. In fact, if you don't mind some temporary strong odors (which you can wash off after the wood has been shaped), your own urine will work well to soften the wood.The way the boat builders do it is to immerse the wood sheet or plank in a dilute ammonia solution until it is saturated. This makes the cellulose easily bendable without splitting. Then they remove the wood and place it among vertical wood rollers which can slide sideways to put pressure on the wood piece to be bent. It is an ancient technique. I read about over 20 years ago but have not done it myself.Good luck with your wood shaping.

    View Instructable »
  • agelbert followed GiulioC147 months ago
      • REcycle - How to Build a Two Wheel Cargo-bike
  • REcycle - How to Build a Two Wheel Cargo-bike

    I was thinking the same thing,

    I was think the same thing.

    View Instructable »
  • agelbert followed Machine Right1 year ago
  • agelbert followed Josehf Murchison1 year ago
  • agelbert followed victoryking1 year ago