1.1 This standard covers the methods for testing black and white photographic enlargers for amateur and professional use in ordinary photographic practice.
1.2 More critical tests may be required for at least some functions of enlargers for photo-gramrnefry, photoengraving and other special purposes, which have not been covered in this standard.
1.3 Some characteristics of enlargers such as ease of operation, good workmanship and finish, and sturdiness cannot be subjected to specific testing. However, they are important and should not be overlooked.
IS 12568-1988 history
1989IS 12568-1988 Test method for black and white photographic magnifying glass