The Science of Dyeing

Posted: Feb. 3, 2020 in: Science in the Classroom

Home / Learn / The Science of Dyeing

The Science of Dyeing

Posted: Feb. 3, 2020 in: Science in the Classroom

Did you know that crushed insects can make up to 40 colours of dye?

Cochineal insects (Dactylopius coccus) live on the prickly pear cactus in Central and South America and Mexico. The females produce carminic acid and can be used to produce dyes for food, textiles and makeup. The carminic acid is pH sensitive and changes colour with the addition of an acid or base. At pH values below 4.5, it appears pale orange; at pH 7–7.7 light red and red, and at pH above 12, its color is magenta-red (Dapson, 2005, 2007 in Müller-Maatsch & Gras, 2016)

References:

J. Müller-Maatsch, C. Gras (2016) Handbook on Natural Pigments in Food and Beverages [Web article] retrieved Aug 23, 2019 from https://www.sciencedirect.com/topics/agricultural-and-biological-sciences/carminic-acid

The MAIWA Guide to Natural Dyes: What they are and How to Use them (n.d.) [Web article] retrieved Aug 23, 2019 from http://www.box19.ca/maiwa/pdf/Guide_To_Natural_Dyes.pdf

Resource: Cochineal Dying (2015, Jul 30) [Web article] retrieved Aug 23, 2019 from https://www.mexicolore.co.uk/maya/teachers/cochineal-dyeing-resource

Image: Cochineal insects taken from: Public Domain, https://commons.wikimedia.org/w/index.php?curid=72164

Related Articles

LGBTQSTEMDAY.png LGBTQSTEMDAY.png
Posted: Nov. 17, 2020

LGBTQ+ STEM Day 2020

In celebration of LGBTQ+ STEM Day we are excited to feature the following organizations which provide year-round support and visibility to the 2SLGBTQ+ STEM community.

Read More
Header Image Aurora.jpg Header Image Aurora.jpg
Posted: Nov. 4, 2020

Aurora Project Public Campaign Launch

It is happening! If you have come by the science centre in the last few months, you know that we are under construction and that The Aurora Project is fully underway.

Read More
IMG_1269.JPG IMG_1269.JPG
Posted: Oct. 26, 2020 in: Behind the Scenes

Capital Power brings the Wind Turbine Exhibit to life in The Science Garage

We are pleased to announce Capital Power’s generous sponsorship of the Wind Turbine Exhibit in support of The Aurora Project at TELUS World of Science – Edmonton.

Read More
View All Stories

Related Articles

LGBTQSTEMDAY.png LGBTQSTEMDAY.png
Posted: Nov. 17, 2020

LGBTQ+ STEM Day 2020

In celebration of LGBTQ+ STEM Day we are excited to feature the following organizations which provide year-round support and visibility to the 2SLGBTQ+ STEM community.

Read More
Header Image Aurora.jpg Header Image Aurora.jpg
Posted: Nov. 4, 2020

Aurora Project Public Campaign Launch

It is happening! If you have come by the science centre in the last few months, you know that we are under construction and that The Aurora Project is fully underway.

Read More
IMG_1269.JPG IMG_1269.JPG
Posted: Oct. 26, 2020 in: Behind the Scenes

Capital Power brings the Wind Turbine Exhibit to life in The Science Garage

We are pleased to announce Capital Power’s generous sponsorship of the Wind Turbine Exhibit in support of The Aurora Project at TELUS World of Science – Edmonton.

Read More
View All Stories
×
×
×