Coated son

Coated son clapton type, fused or other, regardless of the name given to them, have an undeniable advantage in the vape but also some disadvantages. How are they realized and what are the most used materials for this exercise?

What does it consist of

The principle is simple, just take a few centimeters of a resistive wire and coat with a second wire finer using a drill to obtain a result as uniform as possible.

There are also various devices more suited to this type of practice to simplify handling.

One of these devices is Daedalus.

This kit consists of a weighted body that works with two 18650 format accumulators. It is equipped with a small size chuck quite suitable. Be careful because the jaws that pinch the resistive are connected by a spring that is very easy to hang by wanting to fix its thread, as it happened to me.

However, it is very possible to repair, even if the chuck is not removable. Otherwise, there is the same mandrel jig available in DIY stores, although it will need to be modified a bit to make it fit.

The main box, on which a first end of the wire is fixed, is weighted and allows rotation in both directions with a speed regulator.

The other end of the wire will be fixed to a vice using one or two swivels. This wire will be the backbone of the named Clapton.

Another element is provided, but it is not essential, it depends mainly on the diameter of the wire which will encase the first. It is a very light plateau, moving alone as the coating is built, and supporting the coil during the development of the book.

But this plate proves useless when the “framework” is too wide, or if the wire of the coating exceeds a certain diameter. This will therefore be done by keeping the wrapping wire perpendicular to the wire of the framework.

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What is the point of embedding a resistive wire?

The main advantage of the coating is to be able to manage a maximum of liquid to “support” the capillary and therefore offer better flavors and denser vapors. But beware, this advantage can only be effective if the work is regular and well executed. The more perfect your coating, the more favorable the result will be.

The risk of a job poorly done can lead to so-called “hot spots”. It is a part of the coil which is weakened and therefore which heats up more than the rest and heats the capillary more strongly, which gives an unpleasant burnt taste (dry hit), once the resistance is requested.

The other interest is aesthetic. “Coil porn” is the art of combining and balancing several threads, worked or not with different diameters or shapes, to obtain a spectacular visual result.

Ideally, when the aesthetics are perfect, it combines this aspect of capillarity to provide a good result that is a compromise between vape and aesthetics.

The inconvenients

By increasing the quantity of material (the number of resistive wires), the resistive value of the resistor carried out, which is often in sub-ohm, is lowered.
In order to obtain reasonable resistive values, the various types of wire used have a very fine diameter.
The coated wires, by their lower resistive value than a classic coil and by their ability to soak up liquid, are used with high powers and consume much more e-liquid.
All the resistive wires can not be used, in particular nickel which has a very low value per meter and the assembly of these nickel wires does not make it possible to obtain a reliable resistive value because it is likely to be much too low to be taken into account by a box. In addition, this thread is too fragile to be worked efficiently.

Below the table of correspondence of the gauges with the diameter of the wires

The main resistive wires used for coating

In general, the resistive wire materials used are: kanthal, nichrome and stainless steel (SS316L).

Kanthal is the material which has the highest resistive value per meter to keep, in the end, reasonable and stable resistance values. This material is also the most rigid and the accumulation of wire can make the formation of the coil more difficult than usual.
Stainless steel (SS316L) is a fairly flexible material but its resistive value is much lower than that of kanthal, which gives the final resistor a fairly low resistivity. However, this material offers, at the first heater, a wide color panel depending on the temperature, which makes the assembly very colorful and more aesthetic, but this is ephemeral. The SS316L is a flexible and elastic material, making the balance of the turns more difficult to manage to obtain a uniform and perfect coil.

The Nichrome is the most used material for the coil porn because it is the one that has the resistive value closest to the Kanthal with a flexibility of the material resembling that of stainless steel. It is a balance between the two materials but it is also an alloy consisting of Nickel (largely) and chromium. Thus the formation of the resistance is more malleable and the first heating of the coil offers a bluish color.

Also, depending on the desired result, it is possible to mix the different materials. I admit to having a weakness for colored fixtures and for this I often use stainless steel, but to maintain a reasonable resistivity, I sometimes put a kanthal frame with SS316L coating. As a general rule, the temperature control mode on this type of installation should not be used.

Here are some montages made with various coatings