HCA also acts as a toning stop-bath after polysulfide toning. After-toning can be significant in the final wash without HCA. If sulfide toning is used mainly for image protection and not for changing tonal values, HCA protects from over-toning in the final wash. Regards Ralph W. Lambrecht http://www.darkroomagic.com On 2005-11-01 22:53, "Richard Knoppow" <dickburk@xxxxxxxxxxxxx> wrote: > > ----- Original Message ----- > From: "Per Ohstrom" <ohstrom@xxxxxxxxxxxx> > To: <pure-silver@xxxxxxxxxxxxx> > Sent: Tuesday, November 01, 2005 11:25 AM > Subject: [pure-silver] Re: Toning Question > > >> Thanks, Richard, for answering my question before I asked >> it! But I didn't receive your message until now. So, you >> say that HCA is recommended after Viradon and KBT. Does >> that affect the long term permanence of the print or is >> it just for avoiding stains? >> >> Per >> > Its to avoid stains. I use HCA only because I have it and > its easier than mixing up a sulfite bath. I have been > experimenting with a combination toner made by mixing Kodak > Selenium Toner and KBT. Results are good whether the HCA > bath is used or not but the yellow color of the toner is > immediately cleared in the HCA bath and there is no > indication of staining or after toning at all. > Partial toning in KBT is used for image protection > without any subsequent steps so tone prints should be pretty > archival. > > --- > Richard Knoppow > Los Angeles, CA, USA > dickburk@xxxxxxxxxxxxx > > ============================================================================== > =============================== > To unsubscribe from this list, go to www.freelists.org and logon to your > account (the same e-mail address and password you set-up when you subscribed,) > and unsubscribe from there.