diff --git a/technic/machines/register/alloy_recipes.lua b/technic/machines/register/alloy_recipes.lua
index f921705..bd09bd6 100644
--- a/technic/machines/register/alloy_recipes.lua
+++ b/technic/machines/register/alloy_recipes.lua
@@ -24,9 +24,10 @@ local recipes = {
 	{"default:copper_ingot 2",        "technic:zinc_ingot",         "technic:brass_ingot 3"},
 	{"default:sand 2",                "technic:coal_dust 2",        "technic:silicon_wafer"},
 	{"technic:silicon_wafer",         "technic:gold_dust",          "technic:doped_silicon_wafer"},
-	-- latex is being refined to rubber by drying and adding carbon pigments to strengthen the material (which also turns it black)
-	-- it should not yield more rubber than its latex input, but it may be processed faster than ores
-	{"technic:raw_latex 3",           "technic:coal_dust 3",        "technic:rubber 3", 2},
+	-- from https://en.wikipedia.org/wiki/Carbon_black
+	-- The highest volume use of carbon black is as a reinforcing filler in rubber products, especially tires.
+	-- "[Compounding a] pure gum vulcanizate … with 50% of its weight of carbon black improves its tensile strength and wear resistance …" 
+	{"technic:raw_latex 4",           "technic:coal_dust 2",        "technic:rubber 6", 2},
 }
 
 for _, data in pairs(recipes) do