Here's description from scd
Whether through faulty
pre-production work or the
simple fact that the black ink
may have run dry during printing,
exactly half of the 1982
Topps cards can be found in a
“blackless” version. All cards
on the set’s A, B and C press
sheets can be found blackless.
On regular player’s cards the
lack of black printing is most
obvious in the absence of the
facsimile autograph on front.
The thin black pinstripe around
the player photo is also missing
on those cards. On cards in
which the position was supposed
to be printed in black, it
will be missing on these variations.
All-Star cards affected by
this error will be missing the
player’s name. It is estimated
fewer than 100 of each “blackless”
card were released. Originally
cards from the A and B
sheets were found in metro
New York, while the C cards
turned up most often in the
Midwest. Cards from the C
sheet are much scarcer than
those from the A and B sheets,
although limited collector demand
for full sets has kept prices
in relative parity.