I totally agree with you, the copper bleach has been severely oppressed for many years.
It is time to regain his dignity and pride.
The cheapest ovary in history:
But I discovered a number of important issues that should be available:
With regard to the story of copper bleach, I discovered the following:
1. Copper sulphate is available in two types.
A - The normal type (binary) Cas # 7758-98-7
B - There is also the type Quintet Hydrate Cas # 7758-98-8
The difference between the two types is also large and the difference in price is the first item at $ 1.5 per kilo and second at $ 9.4 per kilo. In fact, the original formula was the second type. But the first type is the most common type of market.
* Generally. I have deepened the study of this article and this subject and I have now realized and know why the author of the original formula says that the formula suitable to whiten the number of 5 rolls only.
- I also know why Mr. PE says that copper bleach leaves some transparent red spots on negatives at times.
- You can use the first cheap article, but the amount must be multiplied by 3 times and 0.7 (ie we add 370 grams instead of 100 grams - and also salt sodium chloride)
And then we do the work of filtration and purification of the solution, and then we follow your indirect method of controlling the pH.
- On the whole I will try that plan and I will follow you with the results,
- These conclusions did not come by coincidence, but came after reading many scientific articles, and I learned that the degree of melting copper sulfate in water is 36 grams per 100 milliliters. After doing some inaccurate calculations I learned that this plan would be successful.
Finally - the best results come if deionized water is used and the bleach should be filtered with a piece of medical cotton using a funnel.
----------