Erasmus+ 1 | Page 64

italy (JESI – IIS “Galilei")

Phases

1.Dividing students into groups

2.Activity introduction

3.Group work

4.Product presentation

Objective:

Identify different textile fibres based on their appearance in an optical microscope

Test duration:

2-4 hrs

Materials:

•squeeze bottle

•water

•storage slides

•coverslip covers

•optical microscope

•tweezers

•fibers of wool, silk, cotton, nylon, jute, linen

Procedures:

• shred a fabric sample with scalpels and tweezers in order to obtain a few isolated fibres.

• a thread from the particular fabric is placed on the glove compartment

• it gets wet with water

• it is covered with a coverslip

• the slide is placed under the microscope

• focused on 10x

• the first observation is zoomed 25 times

• the second is zoomed 40 times; the observation is carried out to pick up details

NYLON: thin fibres with regular contours and dense dots

DATA COLLECTION

WOOL: fibres with the presence of superficial flakes

SILK: very thin fibres with regular contours

Microscopic Analysis of Textile Fibres - workshop I

Erasmus+ 64