例如他们发现，如果添加的废棉纱过少，纸张就会薄而易碎而且色泽不均。

For example, it turned out that adding too little cotton led to flaky and unevenly coloured paper.

youdao

下一步是把废棉纱加入湿草梗，然后舂击数小时直至捣制的黏浆与纸浆相仿。

Cotton waste is then added to the wet straw and the mixture is beaten for a few hours until the resulting pulp resembles papier-mache.

youdao