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العمل على المطبوعات - ٢ - المعالجة والطباعة .. كيفية التقاط وتطوير الصور بالأبيض والأسود
WORKING ON THE PRINT
TONING
Although different makes of printing paper offer a subtle choice of colour shades in variations of black , a chemical toning solution gives a much bigger range . The most commonly used toner is sepia , but others include selenium , gold and multi - toners ( which use a selection of colour couplers and a colour developer ) . Each has different procedures for use , and you should study the manufacturer's instructions carefully . Because toners reduce the maximum density from the original black silver , toning procedures work most success- fully on prints that have been exposed and developed quite heavily .
Sepia toning , the most common method of all , is a two - part or three - part process , depending on the final effect that you are looking for . In the first stage , soak the fixed and washed print in the bleach solution provided . You can do this by inspection , for a few minutes , until the image has faded to a pale yellowish - brownish colour . Then transfer the print to the toning solution , which will restore the image in sepia . For a richer brown image , give an additional soaking in the toner for two or three minutes before the bleach bath . For different effects , it is possible , with care , to apply either the bleach or both the bleach and toner locally , using a cotton swab .
Gold toning is a single solution , one - stage process . More than most toning procedures , its effect depends heavily on the type of print emulsion and on other treatments already used . It works progressively , up to about 20min , and it takes this full time for a regular silver - bromide paper to show a change towards blue - black . Chlorobromide paper , on the other hand , turns orange- brown , while a print that has first been sepia toned will turn out purple - brown after a few minutes or orange - red if given the full soaking .
BELOW Sepia toning remains a popular technique , giving treated prints that brownish aged look
BELOW RIGHT , TOP AND BOTTOM Compare the blue - black bias in a gold toned print ( bottom ) with an untreated print featuring the same image ( top ) .
BELOW , LEFT AND RIGHT Sepia toning can be a two- or three - stage process , depending upon how strong you want the sepia effect to be . For a richer brown image ( below left ) , give the print an additional soaking in the toner after the initial soak for another two or three minutes . As these three toned prints show , the increase in toning can be very noticeable - although it is possible to see the effect without toning a complete print . This can be done by applying locally either the bleach or bleach and toner using a cotton swab .
WORKING ON THE PRINT
TONING
Although different makes of printing paper offer a subtle choice of colour shades in variations of black , a chemical toning solution gives a much bigger range . The most commonly used toner is sepia , but others include selenium , gold and multi - toners ( which use a selection of colour couplers and a colour developer ) . Each has different procedures for use , and you should study the manufacturer's instructions carefully . Because toners reduce the maximum density from the original black silver , toning procedures work most success- fully on prints that have been exposed and developed quite heavily .
Sepia toning , the most common method of all , is a two - part or three - part process , depending on the final effect that you are looking for . In the first stage , soak the fixed and washed print in the bleach solution provided . You can do this by inspection , for a few minutes , until the image has faded to a pale yellowish - brownish colour . Then transfer the print to the toning solution , which will restore the image in sepia . For a richer brown image , give an additional soaking in the toner for two or three minutes before the bleach bath . For different effects , it is possible , with care , to apply either the bleach or both the bleach and toner locally , using a cotton swab .
Gold toning is a single solution , one - stage process . More than most toning procedures , its effect depends heavily on the type of print emulsion and on other treatments already used . It works progressively , up to about 20min , and it takes this full time for a regular silver - bromide paper to show a change towards blue - black . Chlorobromide paper , on the other hand , turns orange- brown , while a print that has first been sepia toned will turn out purple - brown after a few minutes or orange - red if given the full soaking .
BELOW Sepia toning remains a popular technique , giving treated prints that brownish aged look
BELOW RIGHT , TOP AND BOTTOM Compare the blue - black bias in a gold toned print ( bottom ) with an untreated print featuring the same image ( top ) .
BELOW , LEFT AND RIGHT Sepia toning can be a two- or three - stage process , depending upon how strong you want the sepia effect to be . For a richer brown image ( below left ) , give the print an additional soaking in the toner after the initial soak for another two or three minutes . As these three toned prints show , the increase in toning can be very noticeable - although it is possible to see the effect without toning a complete print . This can be done by applying locally either the bleach or bleach and toner using a cotton swab .
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