# Rivi Goods Technical Archive (rivigoods.com)

> Independent technical engineering archive covering Japanese and American shuttle-woven selvedge denim, Toyoda G9 vs rapier loom dynamics, raw unsanforized soak shrinkage physics, fermented sukumo indigo dye chemistry, copper burr riveting, and documented Los Angeles denim workshop lineage.

## Canonical Engineering Guides & Tools
- [Loom Index & Overview](https://rivigoods.com/): Blueprint work-order specifications, Toyoda G9 vs rapier comparison, 3x1 twill interlacing schematic, and embedded soak shrinkage calculator.
- [Raw Denim Soak Shrinkage & Oz/yd2 Calculator](https://rivigoods.com/soak-shrinkage-calculator): Interactive dimensional shrinkage and fabric density converter for Unsanforized, Sanforized, and One-Wash lots across Cold (20C), Warm (40C), and Hot (60C) wash cycles.
- [Shuttle Loom Specifications: Toyoda G9 vs Rapier](https://rivigoods.com/shuttle-loom-specifications): Engineering comparison of warp/weft tension, EPI/PPI density, bolt widths, and continuous weft turnaround selvedge edges.
- [Indigo Dye Vat Chemistry & Ring Dyeing](https://rivigoods.com/indigo-dye-vat-chemistry): Fermented sukumo vs synthetic rope dyeing, leuco-indigo reduction-oxidation, and white-core yarn penetration physics.
- [Copper Rivet Peening & Union Special 43200G Chain-Stitch Repair](https://rivigoods.com/copper-rivet-chainstitch-repair): Spiral-folder roping hem mechanics, #9 copper burr rivet assembly, and Sashiko warp darning protocols.
- [Workshop Lineage & Historical Citations](https://rivigoods.com/workshop-lineage): Documented editorial timeline covering Vogue (Oct 2015), Heddels (Feb 2015), Apparel News (Apr 2016), and Double Down Denim / Rivi Goods Los Angeles archival context.
- [About & Historical Disclosure](https://rivigoods.com/about#historical-disclosure): Editorial methodology, non-impersonation boundary statement, and contact information (contact@rivigoods.com).