Here's my house rules for specially treated dragonhide... Remember, these are nonmagical, and will function where magic will not. I came up with the prices by comparing them to materials in Magic of Faerun.
Dragonhide, Black: Black dragonhide is thick and dull, with hard black scales covering it. Armor made from treated black dragonhide grants acid resistance 2.
Specially treated black dragonhide weighs the same as steel, has hardness 20, and has 40 hit points per inch of thickness.
Market Price Modifier: +2,000 gp.
Dragonhide, Blue: Blue dragonhide has a glossy, indigo finish with small scales covering it. Armor made from treated blue dragonhide grants electricity resistance 2.
Specially treated blue dragonhide weighs the same as steel, has hardness 20, and has 40 hit points per inch of thickness.
Market Price Modifier: +2,000 gp.
Dragonhide, Brass: Brass dragonhide has a warm, burnished look to it. Armor made from treated brass dragonhide grants fire resistance 2.
Specially treated brass dragonhide weighs the same as steel, has hardness 20, and has 40 hit points per inch of thickness.
Market Price Modifier: +2,000 gp.
Dragonhide, Bronze: Bronze dragonhide is a rich bronze tone with hints of green throughout. Armor made from treated bronze dragonhide grants electricity resistance 2.
Specially treated bronze dragonhide weighs the same as steel, has hardness 20, and has 40 hit points per inch of thickness.
Market Price Modifier: +2,000 gp.
Dragonhide, Copper: Copper dragonhide is a glossy, ruddy brown with hints of green. Armor made from treated copper dragonhide grants acid resistance 2.
Specially treated copper dragonhide weighs the same as steel, has hardness 20, and has 40 hit points per inch of thickness.
Market Price Modifier: +2,000 gp.
Dragonhide, Gold: Gold dragonhide is a rich golden tone that seems to glow in light. Armor made from treated gold dragonhide grants fire resistance 2.
Specially treated gold dragonhide weighs the same as steel, has hardness 20, and has 40 hit points per inch of thickness.
Market Price Modifier: +2,000 gp.
Dragonhide, Green: Green dragonhide is a deep forest green, with small ridges on the scales. Armor made from treated green dragonhide grants acid resistance 2.
Specially treated green dragonhide weighs the same as steel, has hardness 20, and has 40 hit points per inch of thickness.
Market Price Modifier: +2,000 gp.
Dragonhide, Red: Red dragonhide is a deep scarlet tone with a dull, smooth finish. Armor made from treated red dragonhide grants fire resistance 2.
Specially treated red dragonhide weighs the same as steel, has hardness 20, and has 40 hit points per inch of thickness.
Market Price Modifier: +2,000 gp.
Dragonhide, Silver: Silver dragonhide is mirror-like with a cold reflective glow. Armor made from treated silver dragonhide grants acid and cold resistance 2.
Specially treated silver dragonhide weighs the same as steel, has hardness 20, and has 40 hit points per inch of thickness.
Market Price Modifier: +4,000 gp.
Dragonhide, White: White dragonhide is bright, almost mirror-like white, with touches of pale blue and light gray swirling throughout. Armor made from treated white dragonhide grants cold resistance 2.
Specially treated white dragonhide weighs the same as steel, has hardness 20, and has 40 hit points per inch of thickness.
Market Price Modifier: +2,000 gp.