<< Chapter < Page Chapter >> Page >


Grade 5


Module 13



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


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]


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

Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
characteristics of micro business
for teaching engĺish at school how nano technology help us
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
what is the actual application of fullerenes nowadays?
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
is Bucky paper clear?
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Do you know which machine is used to that process?
how to fabricate graphene ink ?
for screen printed electrodes ?
What is lattice structure?
s. Reply
of graphene you mean?
or in general
in general
Graphene has a hexagonal structure
On having this app for quite a bit time, Haven't realised there's a chat room in it.
what is biological synthesis of nanoparticles
Sanket Reply
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
many many of nanotubes
what is the k.e before it land
what is the function of carbon nanotubes?
I'm interested in nanotube
what is nanomaterials​ and their applications of sensors.
Ramkumar Reply
what is nano technology
Sravani Reply
what is system testing?
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
Privacy Information Security Software Version 1.1a
Berger describes sociologists as concerned with
Mueller Reply
Got questions? Join the online conversation and get instant answers!
QuizOver.com Reply

Get the best Algebra and trigonometry course in your pocket!

Source:  OpenStax, Technology grade 5. OpenStax CNX. Sep 23, 2009 Download for free at http://cnx.org/content/col10979/1.2
Google Play and the Google Play logo are trademarks of Google Inc.

Notification Switch

Would you like to follow the 'Technology grade 5' conversation and receive update notifications?