How does it differ from Nitrocellulose lacquer? No! The clarity of the KTM9 is substantially clearer than other water-basedfinishes on the market. Most Waterbased finishes have a blue cast when you turn the instrument in the light. It is relatively problem free, is clearer than other products on the market and is harder. The KTM9 is by far the best water-based finish available. How does it differ from previous water-based finishes? No, you can use the finish itself as a sealer No, this was only required on the previous KTM product, the KTM4 Sealer –Use the finish itself as a sealer or one of our shellacs.Īre there instructions for how to apply this finish? Pore filler – LMI Pore Filler works fine but for best results, use our System 3 clear epoxy filler with the silica thickener. Shading color mixed into finish – Use either Water Soluble Aniline Dyes, or Water Soluble dye concentrates. Staining raw wood – Use either our Alcohol Soluble Aniline Dyes, or Water Soluble Aniline Dyes, or dye concentrate, (Water-Soluble or MEK-Soluble). Other materials used with water-based lacquer: It is the finish that we recommend most highly to beginning and professional luthiers. It is clear, hard, repairable, economical, does not require a cross-linker or other additives, and shows no blue tint on the finished instrument. We presently offer the KTM9 water-based finish and are confident that it is a great water-based finish to compete with nitrocellulose lacquers. Because of its less toxic nature, it can also be shipped without restriction – unlike hazardous/toxic materials. This makes the water-based system far more economical (guitars per gallon) than using solvent based lacquer. Any required thinning is accomplished with distilled water or a compatible reducer. The water-based urethane has very high solid content so less material is used to finish each instrument, and there is no need for lacquer thinner during spraying or cleanup. The vapors are not harmful or toxic so no breathing protection or strong ventilation is required. The health risks and environmental harm are diminished to almost nothing. The advantages of using this water-based urethane are tremendous for all woodworkers. Although most builders are spraying the water-based urethane, this product also works well as a brush-on finish. Guitar builders using these products claim that they are achieving finishes that are comparable with those of the solvent based product.Īs with the solvent based lacquer system, there are many good products available for pore filling, color shading, sanding, and buffing that are compatible with this water-based urethane. These products are now as easy to apply and work with as solvent-based lacquers and give great results – especially considering the obvious advantages of using a less toxic water-based system. There have been hits and misses, but the currently available water-based products are finally close enough to this goal to be used for guitar finishing. There have been steady improvements in water-based products intended to eventually replace the solvent-based products for all applications. In response, many manufacturers set the goal to manufacture a finish with all of the positive characteristics of current solvent-based lacquers but without the hazardous, toxic solvent base. With personal health and environmental concerns (and regulations) ever increasing, the manufacturers of finishing materials have seen that the long term trend is moving away from solvent-based finishes and toward less hazardous, less toxic products.
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