Gutondekanya amacupa yikirahure (I)

1.Gushyira muburyo bwo gukora: kuvuza ibihimbano; gukanika imashini no gushushanya.

2. Gutondekanya ukurikije ibihimbano: ikirahuri cya sodium; kuyobora ikirahuri hamwe nikirahuri cya borosilike.
3. Gutondekanya ukurikije ubunini bw'icupa.
Icupa rito. Ni icupa ryikirahure gifite diameter yimbere ya munsi ya 20mm, ahanini ikoreshwa mugupakira ibikoresho byamazi, nka soda, ibinyobwa bisindisha bitandukanye, nibindi.
Icupa ryuzuye umunwa. Amacupa yikirahure afite diameter yimbere ya 20-30mm, ifite umubyimba ugereranije kandi muto, nkamacupa y amata.
Icupa ryuzuye umunwa. Nkamacupa yamabati, amacupa yubuki, amacupa yumutobe, amacupa ya bombo, nibindi, hamwe na diameter y'imbere ya 30mm, amajosi magufi n'ibitugu, ibitugu binini, cyane cyane amabati cyangwa ibikombe. Bitewe numunwa munini wamacupa, gupakira no gupakurura biroroshye, kandi bikoreshwa cyane mugupakira ibiryo byafunzwe nibikoresho bya viscous.
4. Gutondekanya ukoresheje icupa rya geometrie
Icupa. Kwambukiranya igice cy'umubiri w'icupa ni uruziga, ni ubwoko bw'icupa rikoreshwa cyane n'imbaraga nyinshi.
Icupa. Igice cyambukiranya icupa ni kare. Ubu bwoko bw'icupa bufite intege nke kuruta amacupa azengurutse kandi biragoye kuyakora, ntabwo rero akoreshwa cyane.
Icupa. Nubwo igice cyambukiranya kizengurutse, kigoramye mu cyerekezo cy'uburebure. Hariho ubwoko bubiri: incamake na convex, nkubwoko bwa vase nubwoko bwa gourd. Imiterere ni shyashya kandi ikunzwe cyane nabakoresha.
Icupa. Igice cyambukiranya ni oval. Nubwo ubushobozi ari buto, imiterere irihariye kandi abayikoresha nabo barabikunda.