In 1840 Talbot made further brilliant advances, discovering how to use chemicals to bring out an image from his sensitive paper after it had only been exposed for a very short time.
Sa 1840 Talbot ginawa karagdagang napakatalino pagsulong, discovering kung paano sa gumamit ng mga kemikal upang maglabas ng isang imahe mula sa kanyang sensitibong papel matapos ito had been exposed lamang para sa isang napaka-maikling panahon.