Spraying the shellac.
Shellac is a finishing material that is widely used since the year 1800's. Shellac is the traditional finishing materials that can provide protection to the wood substrate. At this era Shellac used to be very popular because it can produce finishes that produce a thick film and a high gloss finish. One of shellac finish that was famous is the French varnish, a finishing with a layer of thick film and high gloss that is very special in that era. Now the similar finish looked with french varnish can be obtained easier by using the coating such: as NC or PU coating.
Shellac is a finishing material that is used when the spray technology still not been used for finishing application. The shellac traditionally is applied by padding or brushed. Until now many peoples still apply shellac with brush or rag. But with the development in the finishing technology, now more people prefer to apply shellac by spray. With spray application we can better do control of the shellac application. Spray shellac principally is about the same with spray the lacquer or other clear coating. What we need to do is to adjust the shellac to fit with the spray gun requirement. We also need to understand the character of shellac is little bit different with other clear coating.
Shellac is a finishing material that is used when the spray technology still not been used for finishing application. The shellac traditionally is applied by padding or brushed. Until now many peoples still apply shellac with brush or rag. But with the development in the finishing technology, now more people prefer to apply shellac by spray. With spray application we can better do control of the shellac application. Spray shellac principally is about the same with spray the lacquer or other clear coating. What we need to do is to adjust the shellac to fit with the spray gun requirement. We also need to understand the character of shellac is little bit different with other clear coating.
- Prepare the shellac
Shellac is mostly traded in the flakes form and its must be reconstituted into liquid form when it is applied. Put the pieces of shellac into alcohol and stir it until it is all dissolved to form a viscous liquid. Shellac solution may contain dirt ingredients settle to the bottom of the can. Separate the unsolved solid compound with the liquid shellac. Filter the liquid shellac and check the viscosity. Make sure the viscosity of fluids is accordance with the standard viscosity of the spraying equipment. For the air spray, the viscosity should be about 10 to 14 seconds with the NK 2 cups, or 16-21 seconds with Zahn cup No. 2. (see our previous post: The viscosity of finishing material)
Choose the proper shellac according with the desired color. Shellac will build a yellow brown film color. If we want to finish in white or light color, then the bleach shellac is needed. Consider the finish color resulted with the shellac, make some color panel to make sure we can identifies the finishing resulted.
Choose the proper shellac according with the desired color. Shellac will build a yellow brown film color. If we want to finish in white or light color, then the bleach shellac is needed. Consider the finish color resulted with the shellac, make some color panel to make sure we can identifies the finishing resulted.
Use the dewaxed shellac since it can provide a better film. The wax in the shellac is helping in the padding application, but in the spray application this wax is not needed.
- Preparation on the unfinished wood.
Consider the finish color and the basic color of the wood. Shellac will more act as a film former. Although shellac is also form color, but the color produced is relatively limited. Then we may need to staining the wood to make a certain finish color. If the wood base color is not even, we need to adjust it with equalizer stain and sap stain.
- Prepare the equipment and facilities.
- Spraying shellac
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