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Showing results for tags 'chemicals'.
Hi all! I did an experiment yesterday by putting a pH indicating dye on a strip of maple. I let that dry, and then applied 5% sodium nitrite solution to it, and placed it in the light box. To my surprise, only after a few minutes of light exposure the dye changed from orange to a cool red, indicating the presence of a base. I had always thought that nitrite reaction produces nitric acid, so, I’m very confused as to why this test indicates as alkaline. Anyone have a possible explanation? Also, I’m wondering if this is a good approach to create a pH neutral treatment? I’m not a chemist, but I im
Hi guys! So, I'm doing a retouch on an old trade violin that has spirit varnish. I know that it's somewhat futile to discuss colors without actually showing an example (I'll be approved for pictures soon!), but I'm looking for a varnish that's deep cherry red... much more red than brown. I've thought of making my own 1704 varnish and adding dragon's blood.... but then I saw that one could also use henna, or cochineal, or madder root.... or I could just buy red pre-made varnish from Kremer pigments, and maybe some brown in case I need to adjust the color. So basically, now I'm over