| The collotype plate is then exposed under the negative and washed in cold water until the yellow bichromate no longer comes away. |
| With thirty-two portraits in collotype and frontispiece in colour. |
| Printing high quality collotype illustrations for books was a decent size industry at one time. |
| Four bare-chested pressmen labor in a small room with a huge collotype printing press. |
| Therefore it's no wonder only a handful of collotype studios are still existing in the world today. |
| As a general rule photo-micrographs are best reproduced by collotype. |
