Myth #6: Silver rich films and papers are better than modern films and papers that use lower silver.
This is an out and out myth!
In the early days of photography, emulsion making was a very imprecise science and led to emulsions in which there were a lot of what we called "Dead Grains". They were either insensitive to light or just would not develop. So, in order to get the right contrast or Dmax in a photoproduct, a high level of silver had to be coated. To achieve a density of 3.0 in a film may have taken 500 mg of coated Silver per unit area, 100 years ago, and today only 300 mg of silver per unit area. But, in both the old and new film, only 300 mg of silver per unit area is being developed. You see, a density of 3.0 can be related to an exact amount of real silver metal (taking into account the form of the silver that the developer creates).
The benefit in older emulsions comes from packing the Silver halide crystals tightly to give fine grain. Well, this is good, but today, the same grain can be achieved by making smaller crystals with better senstitivity. So, this evens out. In fact, we come out better with modern, finer grained films with lower silver. The modern films are less turbid and therefore are sharper! So we get the same grain today at higher speed and with greater sharpness all other things being equal, and we can use less silver halide per unit area. Just keep in mind that the amount of Silver metal that forms the image is likely the same or nearly the same in both the Silver rich and low Silver products.
Now, lets think back to myth #5 regarding old and modern developers. Here is a case where there may be another item to support myth #5 as being potentially a true fact. Old, silver rich films and papers will react differently in some of the old developers due to the fact that they were often designed with higher energy to try to push the dead grains into activity without fogging the product.
I have no specific cases for this latter to offer you, but merely present it as a possible special case!
Ron Mowrey