I completely forgot I did an update that I never published. Pitch can be used to make resin.
Changelog 0.8.4
Uranium processing was not producing slag.
Reduced slightly the number of trees produced in greenhouse.
Made duranium gear wheel recipe slightly easier.
Uranium ore stack size increased in line with other ores.
Kovarex process uses more U238 and also produces slag.
Increased wooden board recipe slightly.
0.8.5
Rebalanced steel recipes
Added recipe to make resin from pitch.
(If you can't see the new recipe then try
/c game.player.force.technologies['jr-steam-cracking'].researched=false
/c game.player.force.technologies['jr-steam-cracking'].researched=true
)
Increased stack size of transport belts.