Digi 2
Dear all,
A test:
I have an original image (color RGB) natural dyed
wool.
72 pixels per inch.
I take out ± 28x32 pixels.
Multiply by 100 so
2800x3200 pixels and change the pixels per inch setting into 9 pixels per inch,
because I don't need image sizes like 154 MB.
First image is a light blue
synthetic.
At the right lower corner is the same color to the eye, but it's
natural indigo, one time dye.
If you have Photoshop you can save the image and try this. If you
pick up the eyedropper and move it up and down you'll see that if the eyedropper
is on the synthetic blue the marker in the color display stays in the blue part
only. If you do the same on the indigo part the marker will jump up and down
from yellow to blue and some red.
Next image is cochineal.
Think you can see what part is
synthetic and what part is natural. Here the result with the eyedropper is less
dramatic, but the natural cochineal has a tendency to show more blue towards
purple.
Madder doesn't show any different results.
Madder dyes on very
easy, the distribution is very good and even. So the color marker stays in the
red part whether synthetic or natural.
These images are taken from wool,
at the same distance, same light, same camera and all the wool was on a white
background.
The synthetic dyed wool was chosen with the natural dyed wool
next to it.
Next is green.
Best regards,
Vincent
Green....
The natural Indigo/Safran is at the lower corner.
If the
eyedropper is used this is the result:
In the synthetic, green is picked up
by the eyedropper as maincolor and it goes up and down in the green
spectrum.
In the natural, yellow is picked up by the eyedropper as main color
and it goes up and down in the green spectrum.
Isn't that a nice
result?
I'll try again, with rugs!
Best regards,
Vincent
Hi Vincent
The images are interesting, but I don't know what they are
or how you got them. I understand that they are greatly magnified - but what
were they before you magnified them? For example:
1. Are they direct scans of
small pieces of rugs? Digital photos? Scans of photos in books?
2. Is the
wool being seen along the sides of the fibers, or from the cut ends of pile?
3. How do you know that the natural dyed images were of wool dyed with
natural dyes?
It would be very helpful if you'd post the original images
from which the magnifications were made, with some indication of what regions of
those images were magnified.
Thanks,
Steve Price
Hi Steve,
I use the digital camera because the pixels get me inside
the color: The combinations of colors (reflected light that builds up a color),
that my eyes do not register.
The better the camera, more pixels, the better
it will identify the color construction.
1. Are they
direct scans of small pieces of rugs? Digital photos? Scans of photos in books?
Digital photos of woolen threads taken from natural colors samples
and synthetic color samples. All taken at 30 cm. distance, in jpg format. Each
photo 2.2 MB, 72 pixels per inch.
Except the natural green. It's taken from
an antique kilim because I don't have the Indigo/safran version of green. Lot of
natural greens from different sources, but the natural green we see in the rugs
are mostly a yellow/blue version. (This effect can be seen in all kinds of new
productions and started my scepticism)
2. Is the wool
being seen along the sides of the fibers, or from the cut ends of
pile?
Along the sides.
3. How do you know that
the natural dyed images were of wool dyed with natural dyes?
Because
they are dyed with indigo, madder, cochineal, onion skins, dandelion,
eucalyptus, birch bark, sweet chestnut etc.
Hope all do understand I
didn't do any previous research.
It's all freethinking, ad hoc and a bit
amateurish.
I didn't expect anyone to step forward to tell us how he/she
reached a level of perfection in determining the dyes.
Everybody posting on
this board doesn't seem to have any problems with synthetic dyes. A huge step
forward in my opinion.
The specialists are tumultuously silent.
But, if we
count the words "natural dyes" that have entered this board, the net, rugworld
during the years, it should makes us wonder what the heck w're talking
about.
Best regards,
Vincent
Hi Vincent
Thanks for the additional information. One more thing -
would you be good enough to put up the images from which you enlarged these
little sections? I don't mean that I want to see the 2 MB files, but if you can
adjust them to a few hundred pixels in width and, perhaps, 75 kb file sizes, it
would be helpful.
Regards
Steve Price
Hi Steve,
Best
regards,
Vincent
Hi Vincent
Thanks - that helps. Now, I can see by eye that the colors
are more uniform within each thread in the lower series (which, I suspect, is
the synthetic dyed wool) than in the upper one (wool from old kilims, right?).
This accounts for the nonuniformity of color in the closeups of the old kilim
wool, doesn't it?
Clearly, the colors of the wool taken from old kilims
is less uniform than that of the unused, synthetically dyed wool. The question
is, why? Some possibilities that come to mind:
1. Different nearby spots on a
skein of wool dye differently when natural dyes are used, so they are
nonuniform. I am hard pressed to think of a physical or chemical reason why this
should be so, but can't eliminate the possibility just on that basis.
2.
Different nearby spots on a skein of wool dye identically when natural dyes are
used. If this is the case, how can we account for the obvious variations that we
see?
a. Maybe the old kilims have nearby spots that have faded differently
over the long time since the dying was done. This seems reasonable, since the
nature of weaving would have nearby areas exposed to light them alternating with
areas shielded by being on the back.
b. Maybe normal wear, and exposure to
dirt and stains of various kinds accounts for the variations in the old kilim
wool.
Are there samples of new wool dyed with natural dyes that can be
used for comparison? This would help sort out the possible
explanations.
Regards
Steve Price
Hi again,
This is where I dyed wool.
http://users.skynet.be/wolspinnen
It's all in Dutch,
sorry.
The dye mistress has studied it for at least 30 years before she
started sharing her knowledge.
Best regards,
Vincent
Shoot,
No old wool.
All new natural dyed wool. Never
uniform.
Best regards,
Vincent
Hi Vincent
Thanks. I misunderstood your eaerlier post, thought all the
natural dyed wool was from old kilims. Looking back at it, I see that it was
only the green.
Regards
Steve Price