... deeper color effects. Confirmation of the color tone is recommended.--DHK1600 series can be used in combination with other additives such ... solution, dilute each additives at least by 30 to 50%.--DHK1600 series with water below 40°C. Keep the solution temperature ... solution to be slightly acldic below 7. The performance of DHK1600 series may be affected by the following bath conditions: strong ...