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TECHNOLOGY

Grade 5

PROCESSING MATERIALS

Module 13

DYEING TEXTILE FABRICS

Background

Colour makes the clothes that we wear much more interesting. Which colours do you like wearing? Why?

Right across the world colour plays a significant role in the clothing worn for particular occasions. What colour plays an important role at funerals of white people?

What is the reason for this?

What is the traditional colour of the wedding dress of a bride among white people?

It is interesting to note that the mourners at Chinese funerals wear white clothes and that the guests at a wedding in Lapland wear red clothes.

Assignment 1

Research

Are there specific colours that play an important role in the cultural group to which you belong? Explain this (in three sentences).

[LO 3.1]

Textile fabrics are coloured with dye. In the past, natural dyes obtained from plants and animals were used. Purple dye, for instance, was obtained from a small sea snail. Natural dyes produce soft colours, but it is difficult to obtain the exact shade of a colour time after time. Nowadays, dyes are made from chemical substances that provide bright, predictable colours that are also colour fast.

Assignment 2

Design and Manufacturing

We will be using dyes for colouring fabric. Put on an apron to protect your clothes and wear rubber gloves. You can obtain a natural dye from turmeric, spinach leaves, rooibos tea, beetroot leaves and many other edible plants that you may get hold of easily in your environment, by boiling it in water for approximately ten minutes. Allow the mixture to cool and remove all plant material from the liquid. Strain the remaining liquid. This provides a natural dye that is dissolved in water.

[LO 1.3]

REMEMBER:

For this project you must remember that boiling water is dangerous, because you may get burnt. Keep a first aid kit at hand and do the assignment under the educator’s supervision.

Assignment 3

This is a tie-and-dye project. You will make a fashionable T-shirt or headscarf, but you should not attempt this exercise without adult supervision.

Requirements: Dye; white cotton fabric (a hemmed 50cm square cloth) or a white cotton T-shirt; string for tying the cloth or shirt; rubber gloves; 2 basins for water; a large pot and a plastic bowl; a wooden spoon or a long stick; a heat source (electric or gas stove).

a ) You may have to consult a book on tie-and-dye craft if you have not done this before. Fold and tie the cloth according to the pattern you want to create. Experiment or use ideas from the book you have consulted. You will find that areas that are tied securely will remain white when you dye the fabric, so be sure to wrap the string tightly and to tie it securely.

b) Remember that you need to protect your clothes (apron) and hands (gloves). Also remember the safety precautions when you work with boiling water.

c) Bring the dye solution (the natural dye that you have made) to a boil. Wet the fabric in a bowl of clean, cold water and wring out all excess water.

d) Place the damp fabric into the boiling dye solution and stir it, using the stick or long-handled wooden spoon, until it comes to a boil again.

Questions & Answers

the definition for anatomy and physiology
Watta Reply
what is microbiology
Agebe Reply
What is a cell
Odelana Reply
what is cell
Mohammed
how does Neisseria cause meningitis
Nyibol Reply
what is microbiologist
Muhammad Reply
what is errata
Muhammad
is the branch of biology that deals with the study of microorganisms.
Ntefuni Reply
What is microbiology
Mercy Reply
studies of microbes
Louisiaste
when we takee the specimen which lumbar,spin,
Ziyad Reply
How bacteria create energy to survive?
Muhamad Reply
Bacteria doesn't produce energy they are dependent upon their substrate in case of lack of nutrients they are able to make spores which helps them to sustain in harsh environments
_Adnan
But not all bacteria make spores, l mean Eukaryotic cells have Mitochondria which acts as powerhouse for them, since bacteria don't have it, what is the substitution for it?
Muhamad
they make spores
Louisiaste
what is sporadic nd endemic, epidemic
Aminu Reply
the significance of food webs for disease transmission
Abreham
food webs brings about an infection as an individual depends on number of diseased foods or carriers dully.
Mark
explain assimilatory nitrate reduction
Esinniobiwa Reply
Assimilatory nitrate reduction is a process that occurs in some microorganisms, such as bacteria and archaea, in which nitrate (NO3-) is reduced to nitrite (NO2-), and then further reduced to ammonia (NH3).
Elkana
This process is called assimilatory nitrate reduction because the nitrogen that is produced is incorporated in the cells of microorganisms where it can be used in the synthesis of amino acids and other nitrogen products
Elkana
Examples of thermophilic organisms
Shu Reply
Give Examples of thermophilic organisms
Shu
advantages of normal Flora to the host
Micheal Reply
Prevent foreign microbes to the host
Abubakar
they provide healthier benefits to their hosts
ayesha
They are friends to host only when Host immune system is strong and become enemies when the host immune system is weakened . very bad relationship!
Mark
what is cell
faisal Reply
cell is the smallest unit of life
Fauziya
cell is the smallest unit of life
Akanni
ok
Innocent
cell is the structural and functional unit of life
Hasan
is the fundamental units of Life
Musa
what are emergency diseases
Micheal Reply
There are nothing like emergency disease but there are some common medical emergency which can occur simultaneously like Bleeding,heart attack,Breathing difficulties,severe pain heart stock.Hope you will get my point .Have a nice day ❣️
_Adnan
define infection ,prevention and control
Innocent
I think infection prevention and control is the avoidance of all things we do that gives out break of infections and promotion of health practices that promote life
Lubega
Heyy Lubega hussein where are u from?
_Adnan
en français
Adama
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Source:  OpenStax, Technology grade 5. OpenStax CNX. Sep 23, 2009 Download for free at http://cnx.org/content/col10979/1.2
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