Why natural dyes?

Why Natural Dyes? Because they are better than synthetic dyes. Indeed, the natural dyes are better products, simply because they do not contain chemicals harmful to health. As such products are healthier and more reliable than the chemical synthetic dyes.

The veggies dyes are used for centuries in the high cultures of humanity, proof of kinship with men. Many of them are used as medicinal plants such as indigo, molle, ratania, etc. By contrast, synthetic dyes are very hazardous to health and are banned in countries with advanced environmental and public health laws, as the European Community.

Ecotintes does not use toxic mordants such as chromium, copper and tin, plus ancillary uses natural or low / no impact.

The natural dyes are more aesthetic, unique hues Speaking of aesthetics, natural colors convey beauty, not only call attention to the hearing by its brightness.

The natural combination harmony makes for a high value for the consumer. Natural colors always offer contrasting shades and ranges of hues are impossible to achieve with artificial colorings.

The vegetable dyes represent a sustainable source with respect to their synthetic counterparts, they are a renewable resource. Not the synthetic dyes, they come from oil.

The dyes such as indigo plants have traditionally been a crop rotation, indigo is a legume to fix nitrogen in soil. Synthetic dyes affect the environment both to be produced, or to employment in the textile industry.

Synthetic dyes are hazardous to consumers and very dangerous for workers in the industry. The natural dyescolors are a source of employment for the rural sectors of poor countries. And are safe for workers and consumers.

Banned Azo dyes list

 

From greencotton:
"Are Dyed Clothes Safe to Wear?

The dye on a finished garment, by it’s nature, is chemically stable – that’s what makes a dye color fast. However, research is emerging that examines the short and long term effects of potential skin absorption of dye and finishing chemicals through clothing. The CNN report October 2007 which Shana wrote about on Green Cotton, revealed that new testing procedures (chemical burden testing) reveal that young babies and children actually do have increased levels of chemicals in their bloodstream and skin.

Toxic chemicals are often absorbed into the skin
Because clothing comes into prolonged contact with one’s skin, toxic chemicals are often absorbed into the skin, especially when one’s body is warm and skin pores have opened to allow perspiration. We also know that some individuals have what is known as chemical sensitivity, including when exposed to garments of many types. http://www.chemicalsensitivityfoundation.org/

Symptoms for chemical sensitivity
Symptoms in adults for chemical sensitivity range from skin rashes, headaches, trouble concentrating, nausea, diarrhea, fatigue, muscle and joint pain, dizziness, difficulty breathing, irregular heart beat, and/or seizures. Symptoms in children include red cheeks and ears, dark circles under the eyes, hyperactivity, and behavior or learning problems. See Lotusorganics.com for more information.
Dyes are complex chemicals, and as anyone who’s washed a red shirt with a white shirt knows, they don’t stay put forever.

Why Are Synthetic Dyes So Harmful?
Dyes are so problematic because the families of chemical compounds that make good dyes are also toxic to humans. Each new synthetic dye developed is a brand new compound, and because it’s new, no-one knows it’s risks to humans and the environment.

Many dyes like Amaranth have entered the market, then have subsequently been discovered to be carcinogenic and withdrawn. The European Union in particular has been pro-active in banning dangerous dyes and dyes formulated from toxic chemicals.

But it’s backwards to create a dye, see if it’s hazardous, then ban it if so. Especially since so many dyes are known to be dangerous and carcinogenic.

In addition to the dyes them selves, the garment finishes are often equally as harmful. We will save discussion on garment finishes for another post, but just briefly, they are used for creating wrinkle-free, stain resistant, flame retardant, anti-static, anti-fungal, anti-bacterial, odor-resistant, permanent-press, and non-shrink fabrics.

They can also be used as softening agents, and for creating other easy-care treatments. In fact it is often the dye fixative, used to bond the dye color to the fabric, that causes the most problems. All of these can be particularly challenging for people with chemical sensitivities."

The home site of Ecotintes natural dyes dyehouse in Perú worldwide services. Handmade products cotton alpaca. Owners of Ecotintes brand.
dyes, synthetic dye, chemical, natural dyes, chemical sensitivity, toxic chemicals, chemical synthetic dyes, dye color, natural colors, good dyes, dangerous dyes, garment, new synthetic dye, potential skin absorption, natural combination harmony, chemical sensitivity range, chemical burden testing, public health laws, long term effects, synthetic counterparts, harmful, new testing procedures, brand new compound, hazardous, indigo, toxic mordants, skin rashes, one’s skin, chemical sensitivities

Dangerous Dyes

Although common sense tells us that natural dyes are better than synthetic dyes.

However there are several aspects of the product life cycle - production - use - disposal - to be known, to make a proper comparison with natural dyes.

Compare synthetic dyes versus natural dyes
Comparison divided into four phases:
The manufacture,
The dyeing process,
Use of products by consumers and
Eventual disposal or recycling.

At each stage we need to analyze incoming materials, water use, energy use and effluent gases, liquids and / or solids that are generated.

Manufacture of synthetic dyes
The raw material is oil. Nonrenewable fossil fuels. When a molecule absorbs certain wavelengths of visible light and transmits or reflects others, the molecule has a color.

The part that brings color into a molecule called a chromophore. The chromophore is an aromatic structure containing benzene, naphthalene, or anthracene. A group from a donor chromophore color and is represented by the radicals following: azo (- N = N-), carbonyl (= C = O), carbon (= C = C =), carbon-nitrogen (> C = NH - CH = N-), nitroso (- NO or N-OH), nitric (- NO2 or = NO-OH) and sulfide (> The C = S, carbon-sulfur).

The dyes are synthesized in a reactor, filtering, and mixed with other additives to produce the final product. The synthesis involves reactions such as sulfonation, halogenation, amination, diazotization, and coupling, followed by separation processes that may include distillation, precipitation, and crystallization.

Mostly organic compounds such as naphthalene reacts with an acid or alkali along with an intermediary (such as a nitrate or a sulfonated compound) and solvent mixture to form the dye. The dye is then separated from the mixture and is purified.
In making the dye and its precursors, large amounts of contaminated water, up to 8,000 liters per kilo of dye,

Use in textile dyeing
The color-index of German textile industry includes more than 800 colors and 600 auxiliaries and finishing agents. The "Azo-dyes" can be called acidic, basic, mordant, reactive, disperse, direct, solvents or food dyes.

Not all acid dyes are "Azo-dyes. As seen a study of each animal tests and long-term consequences to human health has not been done and hardly done in the future.

Rensselaer-Bayern Aniline 1900

Direct Dyes Chromiun Geigy

Epidemic of bladder cancer
But it was the "epidemic" of bladder cancer among workers in the textil dyeing industry, which confirmed the suspicion that some azo-dyes are extremely dangerous. Action by having a proven tumor (cancer). Contact with concentrated colors and frequently mentioned causes of the epidemic.

Impact on consumers
According to the limited depth studies on the subject of chemical dyes, this proved that several allergenic dyes, especially the black and darker. A scientific study notes:
"The textile contact dermatitis is probably underestimated because it is not always present in typical fashion because we lack a suitable marker in the standard." .. "The allergens most frequently implicated were textile dyes disperse type, especially those belonging to the azo group (Disperse Blue-124, Disperse Blue-106, Disperse Orange 1 and Disperse Yellow-3)"

Not established a causal relationship of dyed textiles directly with cancer. But if the action of certain dyes in laboratory animals.
There is currently no list of hazardous dyes, there is only a list of aromatic amine dyes which are prohibited.

The home site of Ecotintes natural dyes dyehouse in Perú worldwide services. Handmade products cotton alpaca. Owners of Ecotintes brand.
dyes, synthetic dye, chemical, natural dyes, chemical sensitivity, toxic chemicals, chemical synthetic dyes, dye color, natural colors, good dyes, Many dyes, dangerous dyes, garment, new synthetic dye, potential skin absorption, natural combination harmony, chemical sensitivity range, chemical burden testing, public health laws, long term effects, synthetic counterparts, harmful, new testing procedures, brand new compound, hazardous, indigo, toxic mordants, skin rashes, one’s skin, chemical sensitivities

What are the azo dyes?

Dyes "azo" are the most important chemical class of dyes and colorants in the textile industry, while 70% of organic dyes on the market. Are used to color natural and synthetic fibers, food, candy, cosmetics and beverages

Dyes "azo" dyes are divided into soluble and insoluble pigments, soluble in turn water-soluble and fat soluble. Water-soluble dyes used in textile dyeing and fat-soluble dyes and pigments in printing.

Manufacture of dyes "azo"
The manufacture of dyes "azo" is called diazotization process by which an aromatic amine (also called diazo component) is transformed into a diazonium component which in turn reacts with a coupling component, which can be phenol, or Naphtol an amine to form the dye.

Providing a wide variety of diazo components and coupling components possible, the range of variation of the "Azo-dyes is very large. The number of combinations increases since the dye "azo" can have more of an azo compound.

The color-index of German textile industry includes more than 800 colors and 600 auxiliaries and finishing agents.
The dyes 'azo' can be: acidic, basic, mordant, reactive, disperse, direct, solvents or food dyes. Not all acid dyes are dyes' azo.

Production moving south
The dyes 'azo' are still increasing and it is very difficult to know their exact wording, as companies consider them trade secrets. Production also has been decentralized and "facilities" provided by emerging countries in terms of deregulation promotes the migration of industries from the center to the periphery, and the chemical industry is more comfortable in Bangalore and Chennai (India) in Basel ( Switzerland).

Many dirty production away from the restrictions in the EU or the U.S. but still continues to produce and distribute their products to the world. The customs regulations on dyes and dye is incredibly loose and generic.

  

No.

Sustancia

Código
CAS

1

4-aminodiphenyl 

92-67-1

2

benzidine  

92-87-5

3

4-chloro-o-toluidine 

95-69-2

4

2-naphthylamine   

91-59-8

5*

4-amino-2',3-dimethylazobenzene  

97-56-3

6*

2-amino-4-nitrotoluene 

99-55-8

7

4-chloroaniline

106-47-8

8

2,4-diaminoanisole

615-05-4

9

4,4'-diaminodiphenylmethane

101-77-9

10

3,3'-dichlorobenzidine

91-94-1

11

3,3'-dimethoxybenzidine

119-90-4

12

3,3'-dimethylbenzidine

119-93-7

13

3,3'-dimethyl-4,4'diaminodiphenylmethane

838-88-0

14

4-cresidine

120-71-8

15

4,4'-methylene-bis-(2-chloroaniline)

101-14-4

16

4,4'-oxydianiline

101-80-4

17

4,4'-thiodianiline

139-65-1

18

2-aminotoluene

95-53-4

19

2,4-diaminotoluene

95-80-7

20

2,4,5-trimethylaniline

137-17-7

21

2-methoxyaniline

90-04-0

22**

4-aminoazobenzene

60-09-3

* las aminas 5 y 6 son analizadas indirectamente via reducción a aminas 18 y 19 respectivamente

** no esta disponible un análisis para  4-aminoazobenzene
The home site of Ecotintes natural dyes dyehouse in Perú worldwide services. Handmade products cotton alpaca. Owners of Ecotintes brand.
dyes, synthetic dye, chemical, natural dyes, chemical sensitivity, toxic chemicals, chemical synthetic dyes, dye color, natural colors, good dyes, dangerous dyes, garment, new synthetic dye, potential skin absorption, natural combination harmony, chemical sensitivity range, chemical burden testing, public health laws, long term effects, synthetic counterparts, harmful, new testing procedures, brand new compound, hazardous, indigo, toxic mordants, skin rashes, one’s skin, chemical sensitivities

Product Life Cycle

What is Life Cycle Assessment (LCA)? LCA is the process of analyzing the product's environmental impact - energy and material use, water, air and soil pollution - for the entire product life cycle from 'cradle to grave.

" This analysis is it possible to compare technologies and industrial processes to choose the lowest environmental impact and is set for the various stages of production, the balance of use of resources: materials, energy, water, air and soil, and quantifying the possible contamination that might arise.

Obviously this also considered the impact on workers and on the final consumer. This analysis includes the different stages of mining production inputs, distribution, use and consumption and disposal.

The home site of Ecotintes natural dyes dyehouse in Perú worldwide services. Handmade products cotton alpaca. Owners of Ecotintes brand.
dyes, synthetic dye, chemical, natural dyes, chemical sensitivity, toxic chemicals, chemical synthetic dyes, dye color, natural colors, good dyes, dangerous dyes, garment, new synthetic dye, potential skin absorption, natural combination harmony, chemical sensitivity range, chemical burden testing, public health laws, long term effects, synthetic counterparts, harmful, new testing procedures, brand new compound, hazardous, indigo, toxic mordants, skin rashes, one’s skin, chemical sensitivities

Ecotintes water cycle

Water is used in the extraction phase, the dyeing phase and rinsing of excess unfixed dye into the fibers. The water source is an artesian well, do not use treated water for human use.

The water is reused in all processes where feasible and in darker colors rinses and then used as irrigation water for crops dye plants in the vicinity of Ecotintes. If the temperature exceeds 35 º C, is cooled. The pH (acidity-alkalinity index) is held between 6 and 9. Elvalor 7 being neutral for the water 100% pure.

Indigo dyeing
The dyed with indigo is made from a stock solution that generates no effluent, there is not always stored, recharged and reused. The solution we use contains caustic soda and sodium hydrosulfite, compounds that activate the reduction of indigo, a requirement to bind to the cotton and other natural fibers.

Caustic soda and sodium hydrosulfite are hazardous chemicals, although commonly used as cleaning supplies, are managed with great care. Completed the process of indigo dyeing fibers are neutralized.

These procedures are done according to standard Skal Sustainable Organic Textiles 2002.

Ecotintes water cycle

Used as irrigation water for crops

The home site of Ecotintes natural dyes dyehouse in Perú worldwide services. Handmade products cotton alpaca. Owners of Ecotintes brand.
sodium hydrosulfite, caustic soda, excess unfixed dye, indigo, darker colors rinses, Sustainable Organic Textiles, fibers, water source, irrigation water, extraction phase, acidity-alkalinity index, natural fibers, stock solution, hazardous chemicals, great care, dyeing, effluent, crops, human, dyed, procedures