The case demonstrates the impression of a veneer preparation. Because the finish line is located gently subgingivally, retraction cords must be done.

Double retraction cord technique is demonstrated in this post :
1️⃣ The first small-caliber cord is fully packed inside the gingival sulcus, where it remains throughout the procedure to begin the retraction, to protect the biological space and to control the exudation of crevicular fluid.
2️⃣ The second cord, with a greater diameter, provides lateral displacement of the gingival tissues and is removed shortly before injecting the elastomer. 
⛔️ It is important to not pack it completely inside the sulcus, half of its thickness should remain exposed. In some cases, it is of interest to apply a hemostatic agent for controlling any minor blessing that may occur.

In this case, the one-step impression technique is performed.
3️⃣ Thus, with the assistant is wearing latex-free gloves, hand mixing of the high-viscosity material begins, while the operator starts to remove the second, thicker retraction cord. 
⛔️ The contact of the material with latex gloves inhibits the polymerization reaction. So you can mix it with plastic or vinyl gloves.
4️⃣ Immediately the low viscosity silicone is injected into the gingival sulcus and mild blasts of air are applied to help its displacement inside the sulcus.
5️⃣ The low viscosity material continues to be added until covering the full surface of the prepared tooth.
6️⃣ A tray filled with putty material is brought into position and after the material setting, the impression is removed and evaluated. Note that 🧐 the low viscosity is pressed with putty material penetrating the whole extension is the sulcus, resulting in an exceptional reproduction of the dentogingival structures.

 For me, when I deal with equigingival or supragingival finish lines I prefer using a retraction paste “ astringent, 3M “ giving me good retraction and the best bleeding control ever.