Water Repellency (WR): Water repellency (must meet the standard before washing)
Durable Water Repellency (DWR): Durable…

Regarding WR/DWR, simply arrange a spray test, with the results graded on a scale of 1-5 or 1-100 (see below for the cor…

In most cases, W/R products imply the dual requirements of "DWR + basic water resistance":
DWR allows water to bead off…

The customer's request for WP implicitly requires both DWR and WP, for reasons similar to those mentioned in Q3.
The Ra…