Sign making web with tack killing overcoat removable by washing and related method

A laminated web for use in making signs having cut shapes adhesively attached to a supporting surface, said web comprising:

• a base layer of heavy paper sheet material having a first race and an oppositely disposed second face;
• a colored flexible plastic layer of sign material in sheet form superimposed on said base layer and having a third face facing said base layer and a fourth face facing away from said base layer, said third face of said sign material being the good or glossy face of said sign material;
• a first layer of permanently tacky adhesive interposed between said base layer and said layer of sign material;
• said adhesive of said first layer of permanently tacky adhesive more strongly to said second face of said base layer than to said third face of said layer of sign material allowing said layer of sign material to be peeled from said first layer of permanently tacky adhesive with the adhesive of said first layer permanently tacky adhesive in the course of such peeling remaining on said base layer and coming completely free of said third face of said sign material;
• a second layer of permanently tacky adhesive superimposed on said fourth face of said sign material with said second layer of permanently tacky adhesive defining an outwardly directed tacky surface facing away from said layer of sign material;
• the adhesive of said second layer of permanently tacky adhesive having a more aggressive tack than said adhesive of said first layer of permanently tacky adhesive;
• said laminated web having two marginal side edges engagable with an automated sign maker to drive the web in coordinated movement relative to a cutting tool;
• a polyvinylalcohol layer formed on the outwardly facing tacky surface of said second layer of permanently tacky adhesive for temporarily deadening the tack of the outwardly disposed tacky surface of said second adhesive layer yet allowing the tacky characteristic of said outwardly directed surface to be regenerated by the application of water capable of dissolving said polyvinylalcohol layer.