magic armor + runes

[Lost Ohioian]

Does armor have to be at least +1 in order to add slick rune to it? For that matter any any rune. The question is does the armor have to be magic to add a rune that gives a special property? If yes can someone drop the page number in the CRB.

[Lucerious]

“The number of property runes a weapon or armor can have is equal to the value of its potency rune. A +1 weapon can have one property rune, but it could hold another if the +1 weapon potency rune were upgraded to a +2 weapon potency rune. Since the striking and resilient runes are fundamental runes, they don't count against this limit.”

CRB pg. 580

[YuriP]

Yes. Slick runes are property runes and property runes requires and are limited by potency runes:

Core Rulebook pg. 580 4.0 wrote:

Runes must be physically engraved on items through a special process to convey their effects. They take two forms: fundamental runes and property runes. Fundamental runes offer the most basic and essential benefits: a weapon potency rune adds a bonus to a weapon's attack rolls, and the striking rune adds extra weapon damage dice. An armor potency rune increases the armor's item bonus to AC, and the resilient rune grants a bonus to the wearer's saving throws. Property runes, by contrast, grant more varied effects—typically powers that are constant while the armor is worn or that take effect each time the weapon is used, such as a rune that grants energy resistance or one that adds fire damage to a weapon's attacks.

The number of property runes a weapon or armor can have is equal to the value of its potency rune. A +1 weapon can have one property rune, but it could hold another if the +1 weapon potency rune were upgraded to a +2 weapon potency rune. Since the striking and resilient runes are fundamental runes, they don't count against this limit.