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chem-07-1

REF # CHEM-07 (SG 143a)

An SG 143a that has been subjected to a chemical cleaning agent.  The frame plate color changes from "Green" to "Yellow-green".

 

CHEM-08

REF # CHEM-08 (SG 144)

The use of certain chemicals to clean stamps can also alter their color. These are known as 'color changelings'. In this case, the head and frame color has been pushed toward a bright magenta - way beyond the normal spectrum for SG 144. The stamp was subsequently re-gummed, which may indicate a deliberate attempt to enhance value with a 'rare' color.

chem-08a

REF # CHEM-08a (SG 144)

Another 'color changeling'.  In this case, the head colors have been exposed to, or dipped in, an uknown chemical in order to push the color toward 'Chestnut' - the rare SG 145a stamp.  The frame color has also changed slightly.  Thought to be the work of a certain chemist by trade. 

 

 

chem-08b

REF # CHEM-08b (SG 144)

Another 'color changeling'.  In this case, the head colors have been exposed to, or dipped in, an uknown chemical in order to push the color toward 'Chestnut' - the rare SG 145a stamp.  The frame color has also changed slightly.  Thought to be the work of a certain chemist by trade. 

 

 

chem-08c

REF # CHEM-08c (SG 144)

Another 'color changeling'.  In this case, the head colors have been exposed to, or dipped in, an uknown chemical in order to push the color toward 'Chestnut' - the rare SG 145a stamp.  The frame color has also changed slightly.  Thought to be the work of a certain chemist by trade. 

 

 

Chem-08p

REF # CHEM-08p (SG 185)

With a normal purple frame color, the stamp has likely been exposed to chemicals - producing a substantially redder frame color. The stamp also has a forged cancel. 

 

 

chem-09

REF # CHEM-09 (SG 149)

Another 'color changeling'.  It appears to be either exposed to sun (faded),  or exposed to chemicals.  

 

 

 

chem-10-1

REF # CHEM-10 (SG 151)

An SG 151 that has portraits painted over with a violet water color to mimic the scarcer SG 152a "Purple-black" portrait.

 chem-12

REF # CHEM-12

This is not a poor scan; the stamp is true to scan color and it shows all the signs of being the result of a chemically-induced color change.  In fact, it closely resembles the 5d SG 141ab in color.

 

 

chem-20

REF # CHEM-20

The frame color has been changed from Green to Blue by the use of a chemical.