The recipes used in 'Eavy Metal legend Darren Lathams (now deleted) YouTube tutorial. I have written this up for my reference.

Cool Parchment

1. Basecoat with Steel Legion Drab .
2. With Karak Stone paint all of the parchment, apart from the recess between the two pieces. Do a few coats for full coverage.
3. Use Rakarth Flesh and paint in horizontal lines, picking out the raised details.
4. Highlight the detail more selectively, aiming for most extreme folds and points. Use Pallid Wych Flesh for this.
5. Glaze towards the "wax" with Agrax Earthshade . Also use this for a recess shade between the parchment an in cuts and splits.
6. Selectively highlight edges with small amounts of White Scar or another pure white.

Warm Parchment

1. Basecoat with Zandri Dust .
2. With Ushabti Bone paint all of the parchment, apart from the recess between the two pieces. Do a few coats for full coverage.
3. Use Screaming Skull and paint in horizontal lines, picking out the raised details.
4. Highlight the detail more selectively, aiming for most extreme folds and points. Use White Scar with a little Screaming Skull for this.
5. Glaze towards the "wax" with Seraphim Sepia . Also use this for a recess shade between the parchment an in cuts and splits. You can use Agrax Earthshade where you need a little more definition too.
6. Selectively highlight edges with small amounts of White Scar or another pure white.

Red Wax

1. Basecoat with Khorne Red .
2. Wash detail with Nuln Oil .
3. Highlight raised details with Mephiston Red . Highlight using dots and dabs to make it look irregular and let the colours below show.
4. With a 1:1 mix of Mephiston Red and Ushabti Bone , add smaller highlights, covering even less area.
5. If you are feeling brave, add small specular highlight of pure Ushabti Bone within the previous highlights.
6. Glaze with thinned Flesh Tearers Red to unify highlights.

Purple Wax

1. Basecoat with Screamer Pink .
2. Wash detail with Nuln Oil .
3. Highlight raised details with Pink Horror . Highlight using dots and dabs to make it look irregular and let the colours below show.
4. With a 1:1 mix of Screamer Pink and Ushabti Bone , add smaller highlights, covering even less area.
5. If you are feeling brave, add small specular highlight of pure Ushabti Bone within the previous highlights.
6. Glaze with thinned Volupus Pink to unify highlights.

Green Wax

1. Basecoat with Caliban Green .
2. Highlight raised details with Warpstone Glow . Highlight using dots and dabs to make it look irregular and let the colours below show.
3. With a 1:1 mix of Warpstone Glow and Ushabti Bone , add smaller highlights, covering even less area.
4. If you are feeling brave, add small specular highlight of pure Ushabti Bone within the previous highlights.

Parchment Text

Mix Rhinox Hide and Abaddon Black 1:1. Use a brush with a very fine point and paint rows of dots and dashes across the parchment. Do a second pass if needed to make it look more organic and like writing.