11. The right concentration of dichromate is always a compromise between speed and contrast. 12. A mixture of potassium dichromate and dilute sulfuric acid can also be used. 13. This method used the oxidizing agent potassium dichromate . 14. Other popular bleach solutions use potassium dichromate ( a hexavalent chromium ) or permanganate. 15. During this time the sunlight and potassium dichromate tan the gelatine exposed to light. 16. The ammonium dichromate acts as the photoactive site. 17. Potassium chlorochromate can be prepared from potassium dichromate , hydrochloric acid, and water. 18. The plate is developed by carefully washing out the dichromate salt and dried without heat. 19. His comments about potassium dichromate were fair, moderate, uncontentious, factual and neutral. 20. Ullman has gone beyond simple tendentious editing into full trolling at Talk : Potassium dichromate .
