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Al: Phosphoric acid concentration of over 80%; temperature of 80–100 degrees; keep in boiling water. NaOH solution: 5g of NaOH + 0.5ml of glycerin; temperature of 30–50 degrees. Once transparent, add 6ml of anhydrous alcohol + 8ml of deionized water. Hydrochloric acid: ratio of hydrochloric acid to water is 1:(3–4); temperature from room temperature to 60 degrees. -------------------------------------------------------------- Au: Iodine + potassium iodide; ratio of iodine to potassium iodide to water; room temperature; used for rapid film removal. Amounts: 1g, 4g, 4ml. Aqua regia: Mix of nitric acid and hydrochloric acid; room temperature; acidity too high. Ratio: 3:1. -------------------------------------------------------------- MgF2: Hydrochloric acid; ratio of hydrochloric acid to water is 1:3–4; temperature from room temperature to 60 degrees. Used for acid-resistant glass. Oxalic acid-tartaric acid: ratio of oxalic acid to sodium potassium tartrate to water; bake at 90 degrees Celsius. Does not corrode glass. Potassium/sodium: 1.5%, 1.5%; purity of 97%; treatment time of 2 hours. Used for K-series glass. Concentrations: 0.5%, 0.5%; purity of 99%; treatment time of 1 hour. For element F: concentrations are 0.75%, 0.75%; purity of 98.5%; treatment time of 0.5 hours. For BaK: concentrations are 0.75%, 0.5%; purity of 98.75%; treatment time of 1 hour. ZK -------------------------------------------------------------- ZnS: Hydrochloric acid; ratio of hydrochloric acid to water is 1:4; room temperature. -------------------------------------------------------------- SiO2: Hydrogen fluoride and ammonia; ratio of hydrofluoric acid to ammonium fluoride to deionized water; room temperature. Store in polyethylene containers; protect the other side with MgO. Or use hydrogen fluoride and ammonia: deionized water