Originally Posted by
Jerry Bodine
Merg,
This information might be useful. It comes from an Ilford publication I recently received from Simon Galley at Harmon Technology (but no date given in it). It’s titled “Ilford Multigrade Papers, A Manual for the Darkroom.” Catalog #1927328. Here’s an excerpt:
OPTICAL BRIGHTENERS
In other paper characteristics, Ilford continues to make progressive improvements to the Multigrade system. The optical brighteners that give Multigrade papers their brilliant, sparkling whites stay exactly where they are needed --- in the highlight areas of the print. All Multigrade papers, except Multigrade FB Warmtone, have anchored optical brighteners which means they won’t wash out and the paper stays white. With Multigrade FB Warmtone, the brighteners can be removed with extended washing for an even warmer base tint.
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