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طباعة الشرائح الملونة .. الطباعة .. كيفية التقاط وتطوير الصور الملونة
COLOUR SLIDE PRINTS
Colour transparencies can be printed directly onto paper , using the same tech- niques described for colour negatives . The main difference is that , because a positive image is being made from another positive image , there are extra steps in the process , just as there are in processing colour slide film . Also , any changes to the filtration and exposure are the opposite of those for colour negative printing . When making a print directly from a slide , more light from the enlarger gives a lighter image and adding a filter of one colour gives an increase in the same colour to the printed image . The edges of the print , if they have been held down normally by the frame in the easel , appear black .
ABOVE LEFT AND BELOW LEFT Kodachrome has a very high blue sensitivity . In these pictures , the yellow cast from the setting sun ( below ) has been counteracted by the blue sensitivity of Kodachrome ( above )
LEFT AND BELOW Colours can be made deeper when using slide film by underexposing slightly .
Most of the same equipment chosen for printing negatives can be used here . One difference is in the selection of printing filters , if you do not have a dial - in colour head on your enlarger . Cyan filters are often needed , so make sure that you have a selection of these , in different strengths . As with the negative print- ing process described earlier , a drum is recommended for ease and conveni- ence . In fact , the need for absolute darkness when handling the paper also makes it safer .
The preparation and exposure stages are the same as for a colour negative , but see page 119 for the filter and exposure changes needed when you make corrections after the initial test print . Kodachrome slides , which are different in chemistry from other E - 6 films , will need different filter packs when printing .
Mix and warm up the solutions as described on page 110. There are more of these than in negative printing , so make sure that the water bath is large enough for all the containers . Take the same precautions in maintaining the correct temperature : 37.8 ° C ( 100 ° F ) with a variation of no more than 0.3 ° C ( 0.5 ° F ) . Follow the instructions step by step . As the print is hung up to dry , it will have a bluish cast , but this will clear during drying . Do not try to evaluate the print until it is quite dry .
COLOUR SLIDE PRINTS
Colour transparencies can be printed directly onto paper , using the same tech- niques described for colour negatives . The main difference is that , because a positive image is being made from another positive image , there are extra steps in the process , just as there are in processing colour slide film . Also , any changes to the filtration and exposure are the opposite of those for colour negative printing . When making a print directly from a slide , more light from the enlarger gives a lighter image and adding a filter of one colour gives an increase in the same colour to the printed image . The edges of the print , if they have been held down normally by the frame in the easel , appear black .
ABOVE LEFT AND BELOW LEFT Kodachrome has a very high blue sensitivity . In these pictures , the yellow cast from the setting sun ( below ) has been counteracted by the blue sensitivity of Kodachrome ( above )
LEFT AND BELOW Colours can be made deeper when using slide film by underexposing slightly .
Most of the same equipment chosen for printing negatives can be used here . One difference is in the selection of printing filters , if you do not have a dial - in colour head on your enlarger . Cyan filters are often needed , so make sure that you have a selection of these , in different strengths . As with the negative print- ing process described earlier , a drum is recommended for ease and conveni- ence . In fact , the need for absolute darkness when handling the paper also makes it safer .
The preparation and exposure stages are the same as for a colour negative , but see page 119 for the filter and exposure changes needed when you make corrections after the initial test print . Kodachrome slides , which are different in chemistry from other E - 6 films , will need different filter packs when printing .
Mix and warm up the solutions as described on page 110. There are more of these than in negative printing , so make sure that the water bath is large enough for all the containers . Take the same precautions in maintaining the correct temperature : 37.8 ° C ( 100 ° F ) with a variation of no more than 0.3 ° C ( 0.5 ° F ) . Follow the instructions step by step . As the print is hung up to dry , it will have a bluish cast , but this will clear during drying . Do not try to evaluate the print until it is quite dry .
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