Etching

Sodium persulfate is a chemical compound used to etch printed circuit boards. Printed boards (usually FR1 and FR4 materials are used) contain laminated copper. This chemical will remove it in places where it is not covered (usually it is covered with toner transfer, lightening, or with various colors). For the etching process, it is necessary to dissolve 250g of sodium persulfate in 1 liter of water, by adding the powder to the water, not the other way around. The solution will flood when it is saturated.

• Weight: 500g
• Neutral odor, easily soluble in waterHeating the solution to 50C speeds up the etching process
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• Keep it tightly closed and out of reach of children. In case of contact with skin or eyes, rinse immediately with plenty of water and seek medical advice.

Photo lacquer developer for making printed circuit boards by photo process.

• Weight: 22g
•  Does not contain NaOH