"Bony amber" owes its cloudy opacity to minute bubbles in the interior of the resin.
The finely powdered and washed mineral is too crystalline and consequently of insufficient opacity to be used alone as a paint, and is therefore mixed with "white lead," of which material it is also used as an adulterant.
Tyndall's investigations of the transparency and opacity of gases and vapours for radiant heat, which occupied him during many years (1859-1871), are frequently considered his chief scientific work.
substances having high specific gravity, malleability, opacity, and especially a peculiar lustre, the term "metal" became generic for all substances with these properties.
He examined the opacity of the air for sound in connexion with lighthouse and siren work, and he finally clinched the proof of what had been already substantially demonstrated by several others, viz.
Closely associated with the effect of continental immobility are the effects dependent on the low specific heat and the opacity of the lands, in contrast with the high specific heat and partial transparence of the ocean waters.
Sometimes this principle has weight, and sometimes it has not; sometimes it is free fire and sometimes it is fire combined with the earthy element; sometimes it passes through the pores of vessels, sometimes these are impervious to it; it explains both causticity and non-causticity, transparency and opacity, colours and their absence; it is a veritable Proteus changing in form at each instant."
Semi-opacity and opacity are usually produced by the addition to the glass-mixtures of materials which will remain in suspension in the glass, such as oxide of tin, oxide of arsenic, phosphate of lime, cryolite or a mixture of felspar and fluorspar.
China clay is often used to give paper opacity.
I change the opacity of Ron's layer to match Harry's layer, and blur his edges as well.
It has been suggested that the colour is due to sulphur, but the effect can be produced with a glass mixture containing no sulphur, free or combined, and by increasing the proportion of charcoal the intensity of the colour can be increased until it reaches black opacity.
The latter kind is known as " flashed," and is universally employed in the case of colouring matters whose effect is so intense that in any usual thickness of glass they would cause almost entire opacity.
If this cannot be achieved, examine the eye again in case there is another cause for decreased acuity such as early lens opacity.
It was also found that rapid alternation between 0% and 100% opacity was an extremely successful aid to spotting differences between witnesses.
nib shapes and opacity levels.
The areas of the sky which contain heavy obscuration usually exhibit clouds of several degrees of opacity.
I then adjusted the opacity of the two layers.
Tip: In order to see the frame around your painting, reduce the opacity of your selected painting by close to 50% .
Just select the layer you want to change the opacity on.
Simply select the layer you wish to paint onto, make sure you have the opacity you require then paint.
For this type of shading I use opacity 20% and hardness 0 %, with a brush size of between 8 and 15.
For example, trauma or the effect of corneal opacity on the ability to diagnose cataract.
The relative opacity of the colors is marked on the color chart.
Paint around these edges, using black at a very low opacity to carefully blend this layer into the figure.
Paint at higher opacity over the left side of the face to give the impression of light falling on that side.
opacity effects are present.
opacity tables or volume data (for performance reasons ).
The degree of visual impairment induced by lens opacity differs markedly depending on the location of the opacity.
opacity of the two layers.
opacity of the cornea, anterior chamber or the vitreous.
opacity are opacities in the lenses of your eyes, most commonly found in the elderly.
In another layer, using a large paintbrush at less than 100% opacity, paint your saltire in white across the sky.
The text and image watermark can also be set with different opacity and alignment.
In my work you will see whiteness beneath the opacity of the broadest shadow.
From the value of B.: Bo we see that no lateral spectrum can surpass the central image in brightness; but this result depends upon the hypothesis that the ruling acts by opacity, which is generally very far from being the case in practice.
The enteron arises as a space in the endoderm, and an opacity - the primitive streak - appears at the hind end of the blastopore (fig.
This dataset was analyzed for the presence of opacity effects (resonant scattering) taking place in the star 's transition region.
Simply enlarge your favorite picture to cover the entire page, then adjust the opacity to give it a soft and muted appearance.
Normally they go underneath slightly sheer dresses to offer opacity.
Desaturating color or reducing the opacity of an image in Photoshop is a good way to keep the essence of an image while making it harmonious with the rest of the page.
If you don't want to change your entire profile page around, you can just customize simple objects like your fonts, the contact box, the opacity of portions of your page and more.
They are full of both grace and individuality; the features show excellent draughtsmanship; and the flesh-painting is firm and sound in method, though frequently tending a little to hardness and opacity.
Enlarge a portion of a pretty landscape photo; then adjust the opacity to make a subtle background.
Satin slips can give you just the right amount of opacity under a see-through dress or skirt.
If you'd like to take the opacity up a notch to make sure you're fully covered, you could buy more than one and layer them.
Now in the upper right, I select the 'layers' tab, and with the Harry layer selected, I adjust the opacity of the Harry layer to make it as transparent as I'd like.
For example, to lend a seasonal flair to your Xanga in October, one could start with a pattern of leaves repeating in the background, with the opacity lowered to still easily show the text against it..
The word usage examples above have been gathered from various sources to reflect current and historial usage. They do not represent the opinions of YourDictionary.com.