If you are my classmate ill be very surprised. the answer is streak the box is made wrong. PS: if you are my class mate i remind u that our teachers printer is BROKEN...
Yes, you can paint over a surface that has been cleaned with mineral spirits, but it’s essential to ensure the surface is completely dry and free of any residue. Mineral spirits can leave a thin film, so it's advisable to wipe the surface with a clean, dry cloth afterward. Additionally, using a primer can help improve paint adhesion and ensure a smoother finish. Always check the manufacturer's instructions for both the cleaner and the paint for best results.
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Ceramic mugs are generally safe. Some glazes used in ceramics can leach metals into liquids used in them: responsible makers test the glazes used on items intended for food use before selling them. It is possible for porous ceramics to harbor bacteria, especially if the glaze is cracked or crazed, but there is little risk if the item is washed before use, and is not used for storage.
There are loads all over the place in Melbourne.
Primers are not water proofers, in fact primers can't be left as the finish coat because they have no durability. If the paint acts as a primer how can you expect the paint to stand up as a true finish coat.
colour?
The answer will depend on the mineral. Some minerals, such as talc, are extremely soft and will not mark the tile.
ive got no idea that is y i came here stupid thing
What you are referring to is called a streak test. It's used as an aid to mineral identification. As a mineral is drawn over the unglazed tile surface, it is reduced to a streak of dust which reveals the true color of the mineral. If no color is revealed, the streak color is called white. An amethyst crystal which appears purplish will actually have a white streak, because the streak color of the constituent quartz is white. The purplish color of amethyst is due to other reasons.
Usually the mineral deposits a certain color or colors that you wouldn't see otherwise.
You're testing it's hardness.
The streak of a mineral can be determined by rubbing the mineral against an unglazed porcelain tile to produce a powder. The color of the powder left behind is the streak color of the mineral. It is important to use a streak plate or tile with a hardness greater than the mineral being tested to prevent contamination.
Color is what you observe when you look at a mineral. Streak is the color of the mineral when in a fine powder form. This can be observed by drawing a sample of the mineral over an unglazed porcelain tile and noting the color of the line left on the tile.
yes, though not easily. Moh's hardness scale is not very even- the difference between 5 and 6 is not that great and a sharp point of 5 can possibly scratch a rough surface of 6, the with damage to the 5. This is certainly true where a mineral is recorded as hardness 6, but has variable hardness, so the surface being scratched is actually lower than 6 - Disthene is a well-known example of a mineral with hardness that varies in different directions.
Talc is the softest mineral on the Mohs scale with a hardness of 1, so it can be easily scratched by harder minerals. Talc can scratch over minerals with a lower hardness value, but it cannot scratch minerals that are harder than itself, such as quartz or diamond.
The mineral with a Mohs hardness value of 7 (such as quartz) would scratch the mineral with a value of 5 (such as apatite). This is because a mineral can scratch any other mineral with a lower Mohs hardness value.
start from scratch