diff --git a/lignumis/graphics/empty-quality-catalyst-slot.png b/lignumis/graphics/empty-quality-catalyst-slot.png
new file mode 100644
index 0000000..7c47e53
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diff --git a/lignumis/graphics/icons/quality-gold-catalyst.png b/lignumis/graphics/icons/quality-gold-catalyst.png
new file mode 100644
index 0000000..e27b395
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diff --git a/lignumis/graphics/quality-catalyst-icon-red.png b/lignumis/graphics/quality-catalyst-icon-red.png
new file mode 100644
index 0000000..604a988
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diff --git a/lignumis/locale/en/strings.cfg b/lignumis/locale/en/strings.cfg
index 5186de0..907ea57 100644
--- a/lignumis/locale/en/strings.cfg
+++ b/lignumis/locale/en/strings.cfg
@@ -33,6 +33,7 @@ wood-underground-belt=Wood underground belt
 wood-splitter=Wood splitter
 basic-radar=Basic radar
 active-noise-cancelling-tower=Active noise cancelling tower
+quality-assembler=Quality assembler
 
 [equipment-name]
 basic-portable-generator-equipment-gold=Basic portable generator equipment (gold)
@@ -56,6 +57,7 @@ lumber=Lumber
 basic-repair-pack=Basic repair pack
 cupriavidus-necator=Cupriavidus necator
 dead-cupriavidus-necator=Dead Cupriavidus necator
+gold-quality-catalyst=Gold quality catalyst
 
 [item-description]
 wooden-wall=Use wooden walls to protect your base from the locals and to reduce noise levels.
@@ -122,6 +124,7 @@ natural-gold-soil=Gold-infused soil
 
 [fuel-category-name]
 wood=Wood fuel
+quality-catalyst=Quality catalyst
 
 [mod-setting-name]
 lignumis-belt-progression=Enable progressive belt recipes
@@ -137,5 +140,15 @@ pollution-type=Pollution type
 [surface-property-unit]
 pollution-type=__plural_for_parameter__1__{1=Pollution|2=Spores|3=Noise|rest=-}__
 
+[entity-status]
+no-quality-catalyst=No quality catalyst
+
+[description]
+accepted-catalysts=Accepted catalysts
+quality-catalyst-energy-value=Quality value
+
+[gui]
+quality-catalyst=Quality catalyst
+
 [lignumis]
 start-new-game=Lignumis is meant to be played in a fresh game as it extends the early game before Nauvis.
\ No newline at end of file
diff --git a/lignumis/prototypes/content/data.lua b/lignumis/prototypes/content/data.lua
index 81fe26b..bc2576c 100644
--- a/lignumis/prototypes/content/data.lua
+++ b/lignumis/prototypes/content/data.lua
@@ -25,5 +25,6 @@ require("basic-repair-pack")
 require("basic-radar")
 require("mid-game-recipes")
 require("active-noise-cancelling-tower")
+require("quality-assembler")
 
 require("noise")
diff --git a/lignumis/prototypes/content/quality-assembler.lua b/lignumis/prototypes/content/quality-assembler.lua
new file mode 100644
index 0000000..385139b
--- /dev/null
+++ b/lignumis/prototypes/content/quality-assembler.lua
@@ -0,0 +1,91 @@
+local item_sounds = require("__base__.prototypes.item_sounds")
+
+local QualityAssemblerFactory = require(MF.buildings .. "GravityAssembler")
+local QualityAssembler = QualityAssemblerFactory("quality-assembler")
+
+data:extend({
+    {
+        type = "recipe-category",
+        name = "quality-assembling"
+    },
+    {
+        type = "burner-usage",
+        name = "quality-catalyst",
+        empty_slot_sprite = {
+            filename = "__lignumis__/graphics/empty-quality-catalyst-slot.png",
+            priority = "extra-high-no-scale",
+            size = 64,
+            flags = { "gui-icon" },
+        },
+        empty_slot_caption = { "gui.quality-catalyst" },
+        empty_slot_description = { "gui.quality-catalyst-description" },
+        icon = {
+            filename = "__lignumis__/graphics/quality-catalyst-icon-red.png",
+            priority = "extra-high-no-scale",
+            width = 64,
+            height = 64,
+            flags = { "icon" }
+        },
+        no_fuel_status = { "entity-status.no-quality-catalyst" },
+        accepted_fuel_key = "description.accepted-catalysts",
+        burned_in_key = "used-in", -- factoriopedia
+    },
+    {
+        type = "fuel-category",
+        name = "quality-catalyst",
+        fuel_value_type = { "description.quality-catalyst-energy-value" }
+    },
+    {
+        type = "item",
+        name = "gold-quality-catalyst",
+        icon = "__lignumis__/graphics/icons/quality-gold-catalyst.png",
+        subgroup = "raw-material",
+        color_hint = { text = "C" },
+        order = "a[smelting]-0[gold-plate]",
+        inventory_move_sound = item_sounds.metal_small_inventory_move,
+        pick_sound = item_sounds.metal_small_inventory_pickup,
+        drop_sound = item_sounds.metal_small_inventory_move,
+        stack_size = 50,
+        fuel_category = "quality-catalyst",
+        fuel_value = "1MJ",
+        weight = 1000 / 50 * kg,
+    },
+    table.assign(table.deepcopy(data.raw.recipe["electromagnetic-plant"]), {
+        name = "electromagnetic-plant-quality",
+        category = "quality-assembling",
+        hide_from_player_crafting = true,
+        enabled = true
+    })
+})
+
+QualityAssembler.EntityBuilder:new()
+    :allowProductivity(false)
+    :burnerEnergySource({
+        burner_usage = "quality-catalyst",
+        fuel_categories = { "quality-catalyst" },
+        fuel_inventory_size = 1,
+        emissions_per_minute = { noise = 100, pollution = 6 }
+    })
+    :apply({
+        crafting_categories = { "quality-assembling" },
+        energy_usage = "1MW",
+        crafting_speed = 6,
+        module_slots = 6,
+        allowed_effects = { "pollution", "quality" },
+        effect_receiver = { base_effect = { quality = 10 } }
+    })
+
+QualityAssembler.ItemBuilder:new():apply()
+
+QualityAssembler.RecipeBuilder:new()
+    :ingredients({
+        { type = "item", name = "iron-plate", amount = 100 }
+    })
+    :apply()
+
+QualityAssembler.TechnologyBuilder:new()
+    :prerequisites({ "automation-science-pack" })
+    :count(500)
+    :ingredients({ { "automation-science-pack", 1 } })
+    :time(60)
+    :apply()
diff --git a/sources/empty-quality-catalyst-slot.afphoto b/sources/empty-quality-catalyst-slot.afphoto
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index 0000000..47742f9
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diff --git a/sources/icons/quality-gold-catalyst.afphoto b/sources/icons/quality-gold-catalyst.afphoto
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index 0000000..1e30188
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diff --git a/sources/quality-catalyst-icon-red.afphoto b/sources/quality-catalyst-icon-red.afphoto
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index 0000000..30852cc
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