Hello, it tries to reveal paper color, Ra4, in processor Jobo CPA, with tank 2830, and to second impresiòn already they appear to me màrgenes, that they must be white, (and doubtlessly the copy) dyed of they back water. I suppose that serà by oxidaciòn of the revealer by agitaciòn continuous. To somebody it happens the same to him? any aid or suggestion welcomes. extra data, full the glass of the revealer tank, that he is màs much that what 15 xs suggest Jobo to reveal a copy 21cm. Thank you very much by the aid. Greetings from Argentina.