ES424808A1 - Method of manufacturing a sheet that contains a text that is retroreflecting in all its surface area. (Machine-translation by Google Translate, not legally binding) - Google Patents

Method of manufacturing a sheet that contains a text that is retroreflecting in all its surface area. (Machine-translation by Google Translate, not legally binding)

Info

Publication number
ES424808A1
ES424808A1 ES424808A ES424808A ES424808A1 ES 424808 A1 ES424808 A1 ES 424808A1 ES 424808 A ES424808 A ES 424808A ES 424808 A ES424808 A ES 424808A ES 424808 A1 ES424808 A1 ES 424808A1
Authority
ES
Spain
Prior art keywords
text
areas
retroreflective
microspheres
sheet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
ES424808A
Other languages
Spanish (es)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
3M Co
Original Assignee
Minnesota Mining and Manufacturing Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Minnesota Mining and Manufacturing Co filed Critical Minnesota Mining and Manufacturing Co
Priority to ES424808A priority Critical patent/ES424808A1/en
Publication of ES424808A1 publication Critical patent/ES424808A1/en
Expired legal-status Critical Current

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  • Optical Elements Other Than Lenses (AREA)

Abstract

A method of manufacturing a sheet containing a text, which is retroreflective in its entire surface area, the sheet containing a monolayer of glass microspheres with a refractive index of at least 1.8, and having retroreflective text areas and retroreflective background areas, characterized in that it produces a sheet that is substantially transparent, with text and background areas that are substantially indiscernible under observation conditions with ordinary diffused light, but one of the areas has a higher retroreflective efficiency than the other, whereby the text areas are easily visually discernible from the background areas in retroreflective viewing conditions, apply a mirror partially transmitting the light to the rear surface of the microspheres, having the microspheres and the mirrors associated with them. They in the text areas a retroreflective efficiency different from that of the microspheres and s us associated mirrors applied to the background areas. (Machine-translation by Google Translate, not legally binding)
ES424808A 1974-03-30 1974-03-30 Method of manufacturing a sheet that contains a text that is retroreflecting in all its surface area. (Machine-translation by Google Translate, not legally binding) Expired ES424808A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
ES424808A ES424808A1 (en) 1974-03-30 1974-03-30 Method of manufacturing a sheet that contains a text that is retroreflecting in all its surface area. (Machine-translation by Google Translate, not legally binding)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES424808A ES424808A1 (en) 1974-03-30 1974-03-30 Method of manufacturing a sheet that contains a text that is retroreflecting in all its surface area. (Machine-translation by Google Translate, not legally binding)

Publications (1)

Publication Number Publication Date
ES424808A1 true ES424808A1 (en) 1976-05-16

Family

ID=8466336

Family Applications (1)

Application Number Title Priority Date Filing Date
ES424808A Expired ES424808A1 (en) 1974-03-30 1974-03-30 Method of manufacturing a sheet that contains a text that is retroreflecting in all its surface area. (Machine-translation by Google Translate, not legally binding)

Country Status (1)

Country Link
ES (1) ES424808A1 (en)

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