pensil kya hai?

pensil ek steshanaree aur penting ki mool roop se shuddh grephait (udaaharan Staedtler Pensil Terbaik Untuk Anak) ka banaaya gaya tha. lekhan meediya par grephait schraping dvaara kiya jaata hai. haalaanki, shuddh grephait bhee naram, aasaanee se tod, gande prabhaav de rahee hai jab meediya apane haathon se ragad, aur jab aayojit apane haath gande ho jaata hai. kyonki yah to mittee ke saath itana hai ki rachana kathin grephait ka ek mishran banaaya. isake alaava, mishran kee sanrachana kaagaj ya lakadee ke saath lipate hai.

Ilustrasi Tips Mengenali Pensil Yang Berkualitas Baik

netrtv aur grephait ka upayog praacheen grees mein shuroo hua. haalaanki donon ek chhote se adhik kaale grephait gre dhaariyaan ke prabhaav de. grephait bahut kam hee prayog kiya jaata hai jab tak baad mein 1564 mein borrowdalai, uttaree inglaind ke lek jile mein ek ghaatee mein shuddh grephait kee badee maatra mein shaamil paaya. haalaanki yah koyale kee tarah dekha, khanij jala diya nahin ja sakata hai, aur yah ek chamakadaar kaale rang chhod diya hai, aur aasaanee se ek lekhan satah par hata diya. is samay avadhi grephait abhee bhee tin, seesa, aur kaala seesa ke saath bhramit hai, “netrtv kee tarah” jisaka arth hai lagabhag usee kee prakrti ko dekhate hue. isalie avadhi netrtv pensil (pensil seesa) aaj bhee prayog kiya jaata hai. kyonki banaavat oyalee hai, charmapatr ya tin ke chhote tukade mein lipata hissa ek rassee ke saath pattee bairbaintuktongkat. koee nahin jaanata ki jo pahala vichaar lakadee ke kantenar mein kaala seesa shaamil karane ke lie kiya tha, lekin 1560 ke dashak mein, aadim pensil yooropeey mahaadveep par pahunch gaya tha.

usake baad sheeghr hee, seesa khanan aur kalaakaaron kee maangon ko poora karane ke lie niryaat kiya gaya tha; aur 17 veen sadee mein, kaha ja sakata hai kee badhat har jagah istemaal kiya gaya hai. isee samay, pensil nirmaataon kaala seesa ke saath prayog ke lie ek behatar lekhan upakaran ka utpaadan. shuddh aur aasaanee se nikaala, borrowdalai se netrtv choron aur kaale baajaar ka lakshy ho. is par kaaboo paane ke lie, 1752 mein british sansad tay le ja sakata hai ki chor jel mein band ya ek dand kolonee ko bhaga mein ek kaanoon paarit kar diya.

lekin 1779 mein ek dava kee dukaan kaarl dablyoo schhaiailai shodh kiya hai aur nishkarsh nikaala hai ki grephait netrtv ke saath ek bahut alag raasaayanik gun hai. grephait nivida ka shuddh kaarban aanavik sanrachana hai. 1789 mein ant mein, bhoovaigyaanikon jarmanee, ibraaheem jee varnar naam grephait, jo greek shabd graphaiin, jo likhane ka matalab se lee gaee hai de dee hai. is prakaar, tin ke bajaay ek pensil kee saamagree.

kaee saalon ke lie angrejee grephait pensil udyog banaane kabja hai kyonki yah kaaphee shuddh aage kee prakriya ke bina upayog kiya gaya tha. kyonki yooropeey grephait avar tha, pensil nirmaataon vahaan pensil netrtv mein sudhaar karane ke tareeke ke saath prayog kiya. phraanseesee injeeniyar nikolas jeks chontai mittee ke saath paudar milaaya grephait, laathee mein mishran banaane, aur chimanee mein ise jala diya. mittee ke lie grephait ke anupaat se alag karake, vah jaata hai ki kaale-ek ab tak istemaal kee prakriya ke vibhinn rangon ka utpaadan karane mein saksham tha.

19 veen sadee mein, ek bade vyavasaay mein pensil ka nirmaan. grephait saiberiya, jarmanee sahit kaee sthaanon mein paaya jaata hai, aur ab chek ganaraajy kaha jaata hai. jarmanee mein aur phir sanyukt raajy amerika mein, kaarakhaanon kee sankhya khola. masheeneekaran aur neeche bade paimaane par utpaadan kee keematen, aur 20 veen sadee kee shuruaat mein, yahaan tak ​​ki skool ke bachchon ke lie ek pensil ka upayog kar.

praarambh mein kaagaj phaada soot pahanane vaala lapetakar dvaara pensil grephait. lekin baad mein do lakadee slats ditoraih grephait chhad ke lie ek jagah upalabdh karaane ke lie aur phir ek saath rakha ke saath poore grephait chhad ko kavar karane ke lie ek aur adhik vyaavahaarik aur kaaragar tareeka mil gaya.

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