Variantes of Sidero-Cupreatype
EthylX turn
Use of sodium ethylxanthate to react with copper outside ferrocyanide
Colouring Tannic acid - Na2CO3
The sample is thoroughly lightened using Na₂CO₃ and then coloured with tannic acid. Obviously, the p...
Colouring Tannic acid - NH3
The sample is thoroughly lightened using NH3aq and then coloured with tannic acid. Obviously, the pa...
Colouring Tannic acid - bleach
The sample is thoroughly lightened using bleach and then coloured with tannic acid. Obviously, the p...
Colouring Tannic acid - caustic soda
The paper is thoroughly bleached using highly diluted caustic soda and then coloured with tannic aci...
Discolouration Na2CO3
If severely discoloured, can be used as a base for recolouring afterwards.
Ammonia Bleaching
If severely discoloured, can be used as a base for recolouring afterwards.
Bleaching with bleach
If severely discoloured, can be used as a base for recolouring afterwards.
Bleaching with caustic soda
If severely discoloured, can be used as a base for recolouring afterwards.
Virage EthylX - Na2CO3
The sample is lightly clarified using Na₂CO₃, then turned with EthylX.
Virage EthylX - Bleach
The sample is lightly clarified using bleach, then turned with EthylX.
Virage Bleach - DMDTC
The sample is lightly clarified using bleach, then turned with DMDTC.
