Quote Originally Posted by Photo Engineer View Post
The HT-2 test area will brown up with time. PE
True, areas initially clear will slowly brown.
I've tested Ilford's version of the HT-2 against
Kodak's version. The results, Ilford's spot tests
are sooner to brown and as time goes by they
turn a darker brown than those of Kodak's.

Ilford's is without the acidic acid; no more
than a 1% solution of silver nitrate. Dan