Basic premise: Talented alchemist has been slowly rediscovering list techniques in the background, lacked the right type of mana to advance his job path. Gets sent to Demon territory as sacrifice, Demon territory actually wanted envoys, not sacrifices, also has the type of mana he needed to complete the job change. Alchemist unlocks the hax powers of a high level production job, can now create a lot of cool stuff. Finds a sussy mail-order catalog full of useless junk that would need magic to even work... But they're in a world with magic. Alchemist boy recreates the items, now with crazy cheat-like properties, and gives them to ppl while also unknowingly cultivating a battle harem.
Short review: The artwork, while clean and mostly easy to follow, is actually quite bland. The item designs, especially on wham shots, are quite detailed but the time constraints really show themselves in several places. Waifu design wise, most of the girls are fairly standard-fare forgettable, with an innocent horned maid, tsundere twintails demon lord, and the battle empress being teased as a future waifu. The only really memorable one by chapter 10 is the tanned girl with the runaway magic, and that's because before she gets the cheat item cure from the MC she's either in a full set of armour or naked. Also her skin color makes her pop out a bit from the mostly pale cast. The story itself is fairly standard fare stuff, with the typical softboi mc, who, in a small twist, doesn't have super murdering skills. Instead, he produces support items for other ppl. The story, at least, doesn't present any glaring plot hole that destroys your immersion, so you can shut your brain off and enjoy it as a low brainpower read.
Final rating: 5.5/10, an extra half point for good item design.