Previous in Forum: API 650 Storage Tank   Next in Forum: GMP / ISO / FDA / CE: Are Your Products Better Now?
Close

Comments Format:






Change Mode
Close

Subscribe to Discussion:

CR4 allows you to "subscribe" to a discussion
so that you can be notified of new comments to
the discussion via email.

Close

Rating Vote:







Add Vote
11 comments
Rate Comments: Nested
madhukar joshi
Member

Join Date: Jan 2014
Posts: 7

What is Special in "Blue" Color ?

03/18/2014 1:22 PM

Am in the field of Textile dyeing and synthetic yarn making. In our industry for judging the dye pick-up evenness, the material (normally fabric) is subject to "test dyeing" and for this purpose always "Blue Color" dye is used which is almost globally accepted. My question is about what is special with "Blue" colour and why other colours like yellow or Red are not used?
Register to Reply
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.

Good Answers:

These comments received enough positive votes to make them "good answers".

"Almost" Good Answers:

Check out these comments that don't yet have enough votes to be "official" good answers and, if you agree with them, vote them!
lyn
Guru

Join Date: Oct 2008
Posts: 42355
Good Answers: 1693
#1

Re: What is special in "Blue" Color ?

03/18/2014 1:40 PM

Good question.

If you find the answer, let us know.
Register to Reply
2
Usbport
Guru
Engineering Fields - Optical Engineering - Member Engineering Fields - Engineering Physics - Member Engineering Fields - Systems Engineering - Member

Join Date: Apr 2010
Location: Trantor
Posts: 5363
Good Answers: 647
#2

Re: What is special in "Blue" Color ?

03/18/2014 1:45 PM

Red could be used as well.

In the old color CRT industry pure red was used when de-gaussing a color TV because the human eye is sensitive to small color differences in the red region of the color chart, so it was easier to see if the CRT was properly de-gaussed by displaying an all red screen.

The eye is almost as sensitive to small color differences in the blue as it is in the red, so that's why a pure blue is used in your field. The choice of blue vs red is probably due to some other factor having to do with dye chemistry, availability, or cost.

The eye is much less sensitive to small color differences in green, or in the mixed colors of other parts of the chart.

__________________
 Whiskey, women -- and astrophysics. Because sometimes a problem can't be solved with just whiskey and women.
Register to Reply Good Answer (Score 2)
No more Good Answers. Go to first "Almost" Good Answer
adreasler
Guru
Engineering Fields - Electrical Engineering - New Member Fans of Old Computers - Commodore 64 - New Member Popular Science - Evolution - New Member United States - Member - New Member

Join Date: Oct 2013
Location: Illinois, 7 county region (The 'blue dot' that drags the rest of the 'red state' around during presidential elections.)
Posts: 3683
Good Answers: 89
#9
In reply to #2

Re: What is special in "Blue" Color ?

03/19/2014 9:15 AM

If we combine the data from posts #2 and #3, i think we have the best answer possible.

__________________
 ( The opinions espressed in this post may not reflect the true opinions of the poster, and may not reflect commonly accepted versions of reality. ) (If you are wondering: yes, I DO hope to live to be as old as my jokes.)
Register to Reply
ozzb
Guru
Hobbies - Fishing - Old Salt Hobbies - CNC - New Member United States - US - Statue of Liberty - New Member

Join Date: Mar 2007
Location: Rosedale, Maryland USA
Posts: 5197
Good Answers: 266
#3

Re: What is special in "Blue" Color ?

03/18/2014 2:13 PM

How about that there is no expensive mordant needed to fix indigo dye. The blue dyeing process is easy. So time and money.

__________________
 Life is not a journey to the grave with the intention of arriving in a pretty, pristine body but rather to come sliding in sideways, all used up and exclaiming, "Wow, what a ride!"
Register to Reply Score 1 for Good Answer
Go to Next "Almost" Good Answer
adreasler
Guru
Engineering Fields - Electrical Engineering - New Member Fans of Old Computers - Commodore 64 - New Member Popular Science - Evolution - New Member United States - Member - New Member

Join Date: Oct 2013
Location: Illinois, 7 county region (The 'blue dot' that drags the rest of the 'red state' around during presidential elections.)
Posts: 3683
Good Answers: 89
#10
In reply to #3

Re: What is special in "Blue" Color ?

03/19/2014 9:16 AM

If we combine the data from posts #2 and #3, i think we have the best answer possible.

__________________
 ( The opinions espressed in this post may not reflect the true opinions of the poster, and may not reflect commonly accepted versions of reality. ) (If you are wondering: yes, I DO hope to live to be as old as my jokes.)
Register to Reply
Fredski
Guru

Join Date: Feb 2011
Posts: 7025
Good Answers: 207
#4

Re: What is special in "Blue" Color ?

03/18/2014 2:54 PM

wiki has an informative write up on "Indigo"
Register to Reply
SolarEagle
Guru

Join Date: Mar 2007
Location: by the beach in Florida
Posts: 33392
Good Answers: 1817
#5

Re: What is Special in "Blue" Color ?

03/19/2014 12:28 AM

Blue shades are easy to detect change....

__________________
 All living things seek to control their own destiny....this is the purpose of life
Register to Reply Score 1 for Good Answer
No more "Almost" Good Answers.
pnaban
Guru

Join Date: Jun 2010
Location: srilanka
Posts: 2725
Good Answers: 5
#6

Re: What is Special in "Blue" Color ?

03/19/2014 12:39 AM

In Pipe codes,red,blue,green etc are used for different materials like fuel,oil,fresh water, waste water etc

__________________
 pnaban
Register to Reply Off Topic (Score 3)
Nigh
Guru
United Kingdom - Member - Old New Member

Join Date: Jul 2005
Location: South east U.K.
Posts: 3695
Good Answers: 93
#7

Re: What is Special in "Blue" Color ?

03/19/2014 6:01 AM

Maybe it's not special & has just been chosen so that the tests are standardised & comparable across the industry.

__________________
 I didn't have a really important life, but at least it's been funny (Lemmy Kilminster 1945-2015)
Register to Reply
pnaban
Guru

Join Date: Jun 2010
Location: srilanka
Posts: 2725
Good Answers: 5
#8

Re: What is Special in "Blue" Color ?

03/19/2014 7:43 AM

The sky is blue & its image in ocean too is blue.

__________________
 pnaban
Register to Reply Score 2 for Off Topic
PWSlack
Guru
United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
Posts: 32175
Good Answers: 839
#11

Re: What is Special in "Blue" Color ?

01/23/2025 7:31 AM

Has this got anything to do with the pigment indigo being completely insoluble in water, perhaps?

__________________
 "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
Register to Reply
Register to Reply
Have a Different Question?
11 comments

Good Answers:

These comments received enough positive votes to make them "good answers".

"Almost" Good Answers:

Check out these comments that don't yet have enough votes to be "official" good answers and, if you agree with them, vote them!
Copy to Clipboard

Users who posted comments:

adreasler (2); Fredski (1); lyn (1); Nigh (1); ozzb (1); pnaban (2); PWSlack (1); SolarEagle (1); Usbport (1)

Previous in Forum: API 650 Storage Tank   Next in Forum: GMP / ISO / FDA / CE: Are Your Products Better Now?

Advertisement

Got Something to Say?
Ask a Question
Start a Discussion

Search this Forum
Quality Assurance / Control:
Go

CR4 Sections
Aerospace
BioMech & BioMed
Chemical & Material Science
Civil Engineering
Communications & Electronics
Education and Engineering Careers
Electrical Engineering
General Discussion
Instrumentation
Manufacturing
Mechanical Engineering
New Technologies & Research
Software & Programming
Sustainable Engineering
Transportation

Site Directories
Forum Directory
Blog Directory
User Group Directory
RSS Feeds

CR4 Rules of Conduct
CR4 FAQ
Site Glossary

Who's Online (170 right now)
Show Members
Advertisement