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The offset printing industry adopted CTC in a variety of printing operations. This includes reviving and cleaninThe offset printing industry adopted CTC in a variety of printing operations. This includes reviving and cleaning of blanket rollers, cleaning of scanner drums, exposure machines, binding machines and lamination achines.g of blanket rollers, cleaning of scanner drums, exposure machines, binding machines and lamination machines.
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CTC is also used for cleaning of film and astrollen sheets to remove dust, handling marks and ink marks. Cello-tapes used for mounting the film leave marks on the astrollen sheet. These could affect the final quality of the print and are therefore removed using CTC.
Sl. No |
Solvent |
Sl. No |
Solvent |
1 |
White Petrol |
3 |
Isopropyl Alcohol |
2 |
n-Hexane |
4 |
Methylene Dichloride (MDC) |
Whenever there is risk of fire, it is advisable to use only MDC as it is non-flammable. However, one should use it with caution as it may cause some damage to the films and irritation to the eyes.
Benzene and Petrol are other cleaning agents used by some industries. Their use is strongly discouraged because of the inherent cancer risk.
HAZARDS TO CONSIDER
Every substance has limitations. While every solvent is toxic to a certain extent, the harmfulness varies from one substance to another. A given substance may be hazardous on skin contact, be a fire hazard, harm the environment and / or cause cancer (i.e. red category. ). Knowledge on the hazard ratings will help industries to take appropriate preventive measures and detailed information on hazards and control measures are provided in the TA.
FURTHER INFORMATION
A detailed technical document titled "Selection and Safe Use of Alternatives to CTC – Offset printing" has been published. A soft copy is available for download.
Disclaimer
Ü
Though all care has been taken while researching and compiling the information
presented above, GTZ Proklima accepts no liability for its accuracy. The
reader is advised to confirm its correctness prior to use or purchase of any
substance.
Ü
GTZ Proklima makes no claim in respect of the suitability of any substance as
substitute for CTC in any specific industrial process. Suitability remains to
be verified through trials with due consideration of health and safety
aspects.
Ü
Information provided here does not constitute an endorsement or recommendation
of any product by GTZ Proklima. While preference is given to non-proprietary
products information on selected proprietary products may be included if they
appear to have a better environment, health and safety performance or if they
are already widely adopted by the industry. |
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