Message:

<p>[QUOTE=&quot;*crs*, post: 10141743, member: 196&quot;]Thank you 2manybooks. I&#039;ll be sure to check out those 2 sites. These are definitely paper applied to cardstock. That makes them albumen prints, correct? At this size are they still considered Cabinet Cards or are those basically the ones from studios?</p><p><br /></p><p>The first post here on this forum has helpful websites. This is from one of them. Graphics Atlas</p><p><br /></p><p>The gelatin dry plate process is based on the light sensitivity of silver halides, which are suspended in a gelatin binder on a glass support. The process was used to make both negatives and positive transparencies popularly known as lantern slides. Richard Leach Maddox was the first to successfully make a gelatin dry plate negative in 1871. The process underwent many improvements by a variety of people before it was commercially viable in 1879. Some of the key improvements to making gelatin emulsions included having an excess of halide (salt) in the emulsion (1874); washing the emulsion to remove excess salt and impurities (1874); a procedure called ripening in which the emulsion is heated increasing light sensitivity (1878); machine coating (1880); and finally dye sensitization extending the sensitivity beyond the blue spectrum of light to green light (commercialized in 1882) and to then to the full visible spectrum (1906).[/QUOTE]</p><p><br /></p>

Your name or email address:

Do you already have an account?

• No, create an account now.
• Yes, my password is:
• Forgot your password?

Stay logged in