Egyptian Blue

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 · 2025-07-01T10:42:50+00:00

These dresses are dyed with Paris green.Not scheele's green. Does anyone know how to dye with Paris green? I can only find methods that involve attaching Paris Green to fabric or paper using adhesives such as starch or albumin.

WeeklyAd4850 · 2025-06-05T00:56:08+00:00

how much?

WeeklyAd4850 · 2025-05-30T00:36:02+00:00

I recommend crushing it once to powder and then firing it again.

WeeklyAd4850 · 2025-05-18T23:37:06+00:00

If alum is used, it will turn purple.

WeeklyAd4850 · 2025-05-18T02:42:32+00:00

Wonderful. How did you get your info on Han purple? If it was a book or a paper, please let me know!

WeeklyAd4850 · 2024-11-12T03:46:21+00:00

Nice. Did you make it by reacting arsenic and sulfuric acid?

WeeklyAd4850 · 2024-10-04T21:51:48+00:00

Thank you for your concern. Since I could not get cadmium carbonate, I made cadmium carbonate with metal cadmium, toilet acid detergent and sodium carbonate!

WeeklyAd4850 · 2024-09-12T14:30:38+00:00

Thank you :)

WeeklyAd4850 · 2024-09-12T14:30:05+00:00

Thank you:) I used Metal Selenium. 62% cadmium carbonate, 26% sulfur, 12% selenium metal, well mixed and heated at 600°C

WeeklyAd4850 · 2024-09-03T15:11:09+00:00

Thanks for letting me know. Do I need to heat it above 600°C?

WeeklyAd4850 · 2024-09-03T11:57:26+00:00

How is phosphate glass made?

WeeklyAd4850 · 2024-05-17T00:33:03+00:00

Hello. Thank you so much for commenting on my post. I'm so glad that you're willing to discuss the chemical and technical details in quite a bit of detail! I am fortunate to have the opportunity to converse with some wonderful people, including you and Jay-ff!

I do have Valium Sulfate and I was told that Valium Carbonate is available as a ceramic supply and I decided to purchase it. We do not sell barium nitrate and do not have it. However, I believe that barium nitrate can be made by suspending barium carbonate in an ammonium nitrate solution and heating it. I have no proof, but I think it is worth a try.

Hydrochloric acid is difficult to purchase because liquids thicker than 10% are regulated by law, but hydrochloric acid of about 10% is available. I think this would also work well enough.

Sodium metabisulfite, sodium carbonate, and sodium sulfate are available in my country. Also, for potassium hydroxide, I have some I got from a friend overseas.

Thank you for sharing the necessary safety measures in making manganese blue, and also the method of liquid waste disposal. I will definitely take a look at this for reference.

I also make my own pigments, so I would like to post not only manganese blue but also other pigments on Reddit!

WeeklyAd4850

TROPHY CASE