This program turns grain direction into an executive buying decision for your job. Choose the parent sheet size, product type, finishing method, and (when needed) the spine/fold/score direction. The tool outputs a clear recommendation: ✔ Buy the correct LG/SG option and ❌ Do NOT buy the opposite, with risk notes based on GSM and finishing. It prevents common grain mistakes (especially 70×100 vs 100×70), reduces cracking on folds and spines, and helps you purchase paper in the right orientation for clean finishing and reliable production.