To create green science, you need green electrical circuits and solder for them, but it is not possible to make solder since there is a recipe for the production of liquid solder, and for the formation of a solid substance, solder is required in the form of an object, not a liquid.

Sorry my English not good, google translate help me :)

Please update all mods to the latest version.

To create green science, you need green electrical circuits and solder for them, but it is not possible to make solder since there is a recipe for the production of liquid solder, and for the formation of a solid substance, solder is required in the form of an object, not a liquid.

Sorry my English not good, google translate help me :) Unlock advanced soldering manufacturing technology to unlock

Solder tier 1 is a progression deadlock (all mods updated to latest)

Up front: entire mod list updated to latest as of today before posting — this is not a stale-mods issue. I saw an older solder report answered with "update your mods", so I've ruled that out.

Solder is unobtainable, which hard-locks green science.

• logistic-science-pack → electronic-circuit → bob-solder
• bob-solder ← angels-solder ← molten-solder (item)
• molten-solder (item) ← angels-liquid-molten-solder-2

That recipe sits behind two gates, both needing green science:
1. Unlocked by angels-solder-smelting-2 (150 red + green)
2. Category angels-induction-smelting-2 → requires the MK2 induction furnace, from angels-metallurgy-2 (100 red + green)

Meanwhile angels-solder-smelting-1 unlocks only angels-liquid-molten-solder, which outputs the fluid angels-liquid-molten-solder. I checked a full --dump-data of the pack: no recipe anywhere consumes that fluid. So tier 1 produces a dead-end product.

Green science needs solder; solder needs green science.

Other routes are closed too: bob-solder-alloy / bob-solder (plate path) are enabled=false with no technology unlocking them, and molten-solder_reheating needs solid-solder, whose only producer is a 248k recipe that duplicates existing solid-solder (can't bootstrap).

Fix that works (tested on an existing save, via a small override mod):
- add unlock-recipe for angels-liquid-molten-solder-2 to angels-solder-smelting-1
- set that recipe's categories to {"angels-induction-smelting"} so the MK1 furnace can run it

Tier 1 already requires tin + lead smelting and that recipe uses exactly tin + lead ingots, so it looks like the wrong variant got attached to tier 1. Happy to share the patch mod if useful.