Thanks for information. The dull gum paper wasn't used on 1959 postage due series until sometime after 1978. The 11 and 13 cents postage dues were issued that year and they are all shiny gum. J104 was issued in 1985 and all of them are dull gum type 1B. My guess is that dull gum paper started to be used on the postage dues some time in the early 1980s.
Plate 35283 was first sent to press on 1974/07/10 and cancelled on 1978/03/30 after 251,889 impressions. Plate 35282 was first sent to press on 1977/09/10 and cancelled on 1987/11/12 after 112,444 impressions. I know the plate for 35283 was broken and retired. So it must have been broken before 1977/09/10. Then it was replaced by 35282. Plates 34283/35283 were paired when printed on the Huck-Cottrell press. After 35283 was retired 34283/35282 were paired. This is when the color of the ink changed since all stamps printed from 35282 have the new ink color and all of this printing has shiny gum. All of the later dull gum postage due printings have the third color ink.
J93 new ink color and all shiny gumJ92