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من هو مخترع الممحاه المطاط (استيكة)

02 فبراير 2013

المطاط هو المادة الأساسية للممحاة التي جلبت من اميركا الجنوبية
ولاحظ العالم جوزيف ريستلي عام 1770 أنها قادرة على محو البقع السوداء الغرافيتية الموجودة على الورق, ولكنها كانت سيئة, تفسد بمرور الوقت, وتتلف الورق بدلاً من تنظيفه إلى أن جاء تشارلز قووديير عام 1839 واكتشف طريقة لمعالجة المطاط وجعلها دائمة وصالحة للاستعمال وذلك بتقسية المطاط بإضافة الكبريت لها. لإرتباط الممحاة دائماً بقلم الرصاص عرض ليبمان هيمان من فيلاديفيا سنة 1858 وللمرة الاولى قلم رصاص بممحاة.‏
Joseph Priestley

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