Advice 1: How to dissolve plastic

Plastics are organic materials based on polymers. Due to the special properties under the action of heat and pressure the plastic can take the indicated form, and after cooling to preserve it. In some cases, processing of plastics is carried out using solvents.
How to dissolve plastic
Dissolution of plastics is generally carried out for bonding of multiple parts, made of one type of plastics. These include plastics based on polyvinyl chloride, polystyrene, etc.
Use solvents. During processing the bonding surfaces with a solvent is a natural softening when gluing small enough pressure. In addition to solvents, for this purpose you can use the solutions of bonding polymers.
Before connection, prepare the surface of the plastic, for which it was degrease and treat fine sandpaper.
Apply glue so that the softening occurred along the entire working surface to a depth to provide a solid joint. Apply the adhesive with a syringe, brush, spray or dip.
Press the bonding parts and fix them. The pressure on the surface of the show until then, until a solid adhesive layer.
Recently created a lot of new solvents is not less effective than dichloromethane, but, unlike him, is absolutely safe. By the way, this glue can be made at home by mixing plastic shavings with a solvent. To do this, pour into a metal or glass jar plastic chips, shavings or pieces of ABS plastic, mix with solvent WD-40, approximately 2 cm above the level of the plastic. Mix all and cover the mixture for a day, and then again stir it. If the glue is thick, add solvent.
You can also prepare adhesive based on methylene chloride. This will require only 4 hours. You should know that certain plastics corresponding solvent. For example, for celluloid is acetone, polystyrene – benzene, and organic glass – chloroform.
Useful advice
When working with dichloroethane caution as it is very toxic. There should be good ventilation.

Advice 2 : How to chrome-plate plastic

Chrome products are very popular today. And business not only in their attractive appearance, but also excellent consumer qualities. The chrome layer protects the product from corrosion and mechanical damage, serves as a thermal cloth, etc. it is Obvious that the cost of goods plated with higher than usual and therefore it makes sense to chrome-plate on their own. For experiments use plastic.
How to chrome-plate plastic
For the implementation of chroming plasticand can be successfully used miniature galvanic installation, which does not require the premises of the product in the tub. In the installation comes with a transformer reducing the voltage to 12 V and DC 0.8 and 1 A brush with a special bristle (case is made of organic glass with a diameter of 20-25 mm - it is filled with the electrolyte). Also, instead of the transformer you use a battery with all the wires. Brush bristles need to wind a lead wire (if there is insufficient you can replace copper). In case the brushes need to install a diode type DZOZ – ДЗО5. The anode of the diode connect to one of the cables of the transformer step-down winding, the cathode, to secure it in the clamp, must be connected to the cover part. When using the battery, the diode is not used.
Details that must be handled, need to be cleaned from grease, rust and other dirt. Then you need to process the detail in the solution, which consists of 100-150 g of sodium hydroxide, 3-5 g silica glue, and 35-50 grams of soda ash in 1 litre of water. Degreasing solution must be heated to a temperature of 80-100 ° C, depending on the degree of contamination of the items and keep it in this detail from 15 minutes to 1 hour. Depending on smooth and clean surface of the part will depend on the plating. Pre-processed item is connected to the transformer, brush pour the required amount of electrolyte and serves food. Applying on the surface of the part smooth layer of metal, the remainder of the electrolyte, gently move the brush in up and down motion. In order to achieve the necessary thickness of the coating passage in one place varies from 20 to 30 times. Fill the electrolyte in the brush when it will end.
After processing, the part must be rinsed into the waste water, followed by polishing with a piece of material. With the above solutions should be treated with great caution, so as not to get unwanted burns and poisoning. To store the kitchenware will be the safest in glass containers with dark surface and durable stopper.
Also take into account the fact that not all coatings are amenable to influence with various metals. For example, to produce a coating of steel parts with Nickel, it before doing this process a thin layer of copper, the chrome surface interacts with the Nickel surface.
Is the advice useful?