Month: March 2020

How to choose a projector for the home: DLP or LCD

Brayden Warren

Before buying a projector, you have to choose which technology suits you best: DLP (Digital Light Processing) or LCD (Liquid Crystal Display). We will clear out what lies behind these names and help you make the right choice.

DLP and LCD projectors feature imaging technology. 

In a pocket projectors 2020, the light of a lamp is split into primary light rays using a prism: green, blue and red, and then it hits one of three small liquid crystal matrices. LCD matrices transmit light only at the points (pixels) needed to create the image, after which the three light beams are combined again and create a complete image.

In a DLP projector, light first passes through a rotating color filter. After that, it is guided by a million small movable mirrors and is projected through the lens onto the screen. Thanks to the movement of the mirrors in accordance with a certain color, the human eye perceives a full-fledged image, although it is formed from a sequential projection of pictures in three primary colors.

In addition to LCD and DLP projectors, there are competing models – LED projectors.

LED projector

None of the two technologies can be called perfect. Which projector would be best for you depends on what you are going to use it for.

The advantage of LCD technology is that the dark and light colors of the image are subtly graded. But at the same time, their maximum contrast is lower than that of projectors with DLP technology, because the image can not be created completely without light.

DLP technology allows you to turn off small mirrors in dark areas of the image, which is why the picture becomes really black, and the contrast, respectively, is higher than that of the LCD. The disadvantage of a DLP projector is that the picture consists of separate images of the primary colors. Fast moving objects may have a color loop called the “rainbow effect”.

  • LCD – a projector which is best for watching movies and videos.
  • DLP – best for photos and presentations.

Thus, if you want to use a projector for a home theater, it is better to purchase an LCD model to avoid the effect mentioned above. The DLP projector is better to be used for viewing photos and presentations, as it provides higher contrast.

Choosing a comb for a dog

Brayden Warren

Each dog breed requires a special approach – proper care, in which the procedure for combing your favorite pet takes an important place. At some point, any owner thinks about which comb to choose in order to fully ensure proper care for their dog’s coat.

The coat is different for each breed, respectively, and you need to buy a suitable comb for a dog. Coming to a pet store or browsing the pages of an online store, often your eyes just run up from the options offered. Simplifying the task, we offer you a useful guide for choosing combs and brushes for dogs.

It should be added that it is best to comb the clean coat of dogs after washing them, when the hair is still wet. Timely, it is necessary to approach the elimination of mats / tangles.

Perfect dog hair is impossible without the right tools

All devices for combing dogs are conventionally split into different types. These include various trimmers and slickers, combs and brushes, scaffolds and rakes – all options are listed here. In addition, there are also furminators for eliminating the undercoat.

The largest variety is among brushes and combs. They differ in different parameters: stiffness, bristle and base material, size, etc.

Buying shampoo and wax for paws is also a top priority at a pet store, but first choose the right comb for your pet.

Dog comb options

Steel brush – suitable for breeds with hard hair, indispensable for long-haired breeds, with its help you can comb out clumps of hair. Such brushes differ in size, and when choosing it, the size of the dog should be correlated with the size of the brush.

The most popular option is a classic comb the teeth of which can have different lengths. The longer the coat, the longer the teeth need to be on such a comb, it will always allow you to comb a pet of any breed well enough.

Slickers are great for dog hair and undercoat, they are a metal brush with bent teeth, and the regular use will prevent the appearance of unnecessary tangles.

Furminator – a brush against shedding, is suitable for dogs with a thick undercoat, it will help to remove dead hairs, and also prevent the appearance of tangles. The use of this brush with spaced teeth made of metal will minimize the appearance of dog hair on carpets and furniture in the house.

A brush with natural bristles is necessary for cosmetic purposes; various oils, balms and conditioners can be applied with it.

Massage brush (put as a glove on your hand) – suitable for combing short-haired breeds.

A comb with movable teeth is an excellent choice that will allow you to delicately comb the hair and undercoat without harming the skin of the animal.

Brushes with teeth of different lengths – can cope with difficult to comb hair.


Dog hair can be combed every day, there is no restriction in this matter. The main thing is not to damage the delicate skin of the animal.

Rules for choosing a dog comb

When selecting the necessary accessory, initially pay attention to the material it is made of – it is better to abandon the plastic, and purchase only natural materials. Next, determine the length of the pet’s hair, then make your choice based on the properties of the bristles of the comb.

Bristles are most often made of metal with an antistatic effect, natural (from the wool of other animals), silicone (provides a good massage effect).

Pay attention to the convenience of use, so that it would be convenient for you to hold the brush handle in your hands and comb your dog’s coat well.

It is also necessary to pay attention to the teeth of the brush, they should not be too sharp, otherwise you can easily injure the skin. The perfect option would be teeth, the tips of which are coated with silicone or have a rounded shape.

A convenient option is a double-sided comb which has a classic brush with spaced / thin teeth.

Make the care of your dog simple and problem-free with the help of various accessories for combing, which you can conveniently choose in any online store for pets.

Rust Converter: Types and Applications

Brayden Warren

Metal in most cases is quite strong and durable material, but it also has its own vulnerable point. Under the influence of environmental factors, it is susceptible to corrosion. To begin with, let us consider in more detail the nature of this phenomenon and its most widespread form – rust.

Purpose and principle of operation of converters

The term itself originates in Latin and is derived from the word “corrodere” (translated as “gnaw”). When iron and water interact, an oxide reaction is triggered, which causes rust on the metal. Simply put, an iron molecule turns into an iron hydroxide. This process is irreversible, as the resulting rust stain attracts and absorbs water in the air.

The physical and chemical effects of the soil and the atmosphere have a very negative impact on the safety of the metal. The most basic type of corrosion is considered to be atmospheric, when the moisture contained in the air is deposited by the thinnest layer on the metal surface. The content of various impurities and gases in the atmosphere contributes to the formation of corrosion as soon as possible. Next to large industrial enterprises, the rusting process will be much faster compared to the forest park zone.

But the metal placed in the ground also remains unprotected. Ground is an equally dangerous environment containing a large number of chemical elements and compounds. Apart from the moisture in the soil itself, these elements significantly accelerate the process of iron oxide. Depending on the aggressiveness of the soil, metal loses up to five percent of its quality volume. Pipelines, wells, piles – these are some elements of infrastructure that are in the “risk zone”.

To date, one of the most effective and practical means to combat corrosion of the metal is a rust converter. It is a chemical reagent that reacts with iron oxide (rust) and neutralizes its destructive effect. In addition to this, a protective layer appears from above, which prevents further development of corrosive processes in the metal.

Due to its properties, this substance finds application in the construction of metal structures, pipelines, bridges and overpasses. Considering the dependence of the corrosion process speed on the gas content in the environment, the use of a rust converter is simply indispensable in the industrial sector.

A variety of rust converter

Select a rust filter based on the surface to be treated. Different compositions of the reagent may affect and interact with the metal in different ways. Two main types of converters can be distinguished by their composition – acidic and acid-free.

  • Acid. The active substance in such a converter is orthophosphoric acid. Means of this type have a double effect – the destruction of the rust itself and the formation of a protective film on the metal surface. A significant disadvantage is the application of the product only on a dry surface.
  • Acid-free. Tanin is an active substance in such additives. This organic component, when reacting with rust, turns iron oxide into corrosive inactive compounds with excellent adhesion properties. Converters of this type can be filled with water, which makes them an excellent way to protect pipes, rolled metal and fittings before concreting and applying paint.