The present invention discloses an inner layer, a virus filtering layer formed over the inner layer, and a virus eliminating layer formed over the virus filtering layer. The method of forming the facial mask includes the preparation of the roll to roll apparatus includes a tank to carry anti-virus solution, a substrate is driven by a driving device from one end to another end for controlling the thickness of the layer on the substrate by controlling the speed of the substrate.一種口罩，包含：裏層；病毒過濾層，配置於該裏層之上；及病毒抑制層，配置於該中層之上，抑制病毒，其中製作步驟至少包含利用轉軸至轉軸式裝置，其包含浸染槽，備置浸染溶液。浸染槽用於承載抗病毒藥劑，藉由驅動裝置，依據轉軸旋轉，牽動基材移動由一端捲至另一端，控制該轉軸轉速，控制移動速率，進而控制材料厚度。
