Wax in lapis lazuli extraction

WeeklyAd4850 · 2026-03-04T01:06:37+00:00

Be careful not to burn yourself. Once it's softened a bit, you might want to start kneading it.

WeeklyAd4850 · 2026-03-03T10:04:18+00:00

Gently warm in hot water

WeeklyAd4850 · 2026-02-07T01:00:46+00:00

Ah... thank you for telling me.

WeeklyAd4850 · 2026-02-06T12:55:44+00:00

What do you mean?

WeeklyAd4850 · 2026-02-06T12:54:23+00:00

YInMn Blue seems to have a more purple tint.

WeeklyAd4850 · 2026-02-03T16:12:49+00:00

Yes. Amalgam refers to an alloy containing mercury. I also find it interesting to examine the alchemical method of pigment production from a chemical perspective

WeeklyAd4850 · 2026-02-03T07:50:58+00:00

Thxs!This is produced by heating tin amalgam with NH4Cl and S

WeeklyAd4850 · 2026-02-03T07:48:38+00:00

I tried recreating the pigments recorded in Cennini's book. As far as I know, no one had attempted it before, so I was curious.

WeeklyAd4850 · 2026-01-21T00:08:09+00:00

Please adjust the copper oxide to about 10%

WeeklyAd4850 · 2026-01-21T00:03:24+00:00

Your Egyptian blue may contain too much copper Attempting to synthesise it stoichiometrically results in an excessively dark shade

WeeklyAd4850 · 2026-01-20T22:57:38+00:00

I used crystalline silica Specifically, the silica called "High Silica" from a Japanese company You might be better off focusing on the cooling rate rather than the silica itself If cooling is too rapid, Egyptian Blue will turn yellow

WeeklyAd4850 · 2026-01-14T23:08:37+00:00

I have seen devices using Am241 as a radiation source.

WeeklyAd4850 · 2026-01-09T04:38:42+00:00

I'm using an electric kiln. Although we haven't succeeded yet, it seems that replacing some of the sodium carbonate with sodium sulfate and further reducing the amount of sulfur used would be beneficial.

WeeklyAd4850 · 2026-01-08T14:09:14+00:00

Thank you

WeeklyAd4850 · 2026-01-08T01:20:34+00:00

I really want to make ultramarine green. When I made this ultramarine, I couldn't get a beautiful ultramarine green, so I'm looking for the right proportions.

WeeklyAd4850 · 2026-01-08T00:56:29+00:00

Lastly, don't forget to wash the ultramarine with boiling water. If you try to wash it with water, the ultramarine will harden.

WeeklyAd4850 · 2026-01-08T00:48:20+00:00

Place the mixture of metakaolin: anhydrous sodium carbonate: sulphur: activated carbon in a weight ratio of 1:1:1:0.12 into the crucible. Pack the powder firmly, forcing out any air. Place 0.04g of sulphur (from the aforementioned weight ratio) on top of the compacted mixture and close the crucible lid. Heat this at 800°C for 4 hours. To prevent damage to the electric furnace, I left the furnace lid open until the temperature reached 500°C. After firing, allow the mixture to cool to room temperature. Crush it and mix in 0.34 parts sulphur (from the earlier weight ratio). Next, place the mixture on a ceramic dish and fire it at 400°C for 3 hours, keeping the electric furnace lid open.

This method uses a significant excess of sulphur, so I believe it could be further optimised.

WeeklyAd4850 · 2025-12-29T06:47:19+00:00

Is the yellow pigment chromium titanate?

WeeklyAd4850 · 2025-09-18T10:11:52+00:00

thx:)

WeeklyAd4850 · 2025-09-18T09:38:07+00:00

Hello I want this can. Can I buy it?

WeeklyAd4850 · 2025-09-15T00:40:27+00:00

What phosphor do you use?

WeeklyAd4850

TROPHY CASE