There are several possible ways that the lorica musculata could have been manufactured.

This is a brief list of the many techniques and materials that may have been available to the ancient Romans. This is not meant to be an all-inclusive list, but rather a starting point. There is very little evidence in the literary record for a specific profession for making specialized armor like the lorica musculata. No lorica musculata survive, but we do find a wide variety of luxury goods, including metal plate, vases and boxes that demonstrate techniques were available for the manufacturing of the lorica. It's also important to note that there was undoubtedly a strong relationship between the artisans that produced sculpture, luxury objects and the artisans that produced these loricae since the techniques are the same. Artists were certainly using the same materials and techniques as these craftsmen and for all we know, may have been the same people.

As others and myself experiment with certain techniques, those findings will be included.

Repousse is the technique of creating a detailed relief by pushing, hammering or working the material, usually sheet metal, from the opposite side of the finished product. The relief is pushed out from behind, though it can be touched up from the front as well. Repousse was used anciently from before the Greek period to produce very detailed work in plate metal and other materials. There is a wide variety of repousse pieces including plates, vases, boxes and other objects in the historical record. The techniques of these objects were readily available and easily adaptable to making ornate armor. The surviving Greek examples of the muscled cuirass were probably made with this technique. These demonstrate that the skills needed to replicate the kind of details we see in the loricata were widely available.

I have worked in repousse in a very limited fashion on small decorative pieces. Many re-enactors have had success in producing small items such as the decorative plates found on baltei or even fibulae. Making elaborate figurative pieces such as we can see on many loricae is another matter. At that level repousse is a very difficult skill to master and was certainly the province of professional artisans. Repousse can be used limitedly in leather, but it is harder to discuss this as a possibility for the lorica musculata since no examples survive. When I get the time I am hoping to see if repousse can be effectively worked in leather. Fortunately, repousse in metal is far more durable and there are numerous examples. If the lorica musculata was made in metal using repousse, why have no examples survived? Repousse tends to stretch the material to very thin proportions, which is fine in luxury goods that don't take much wear and tear, but it might have been unsuitable for armor, unless the armor was meant to be purely ceremonial.

Lost-wax casting is another ancient technique that was commonly known. A rough model in clay is prepared and then the final surfaces are applied in wax. A second layer of clay or similar casting material is applied over the wax layer and then fired in a kiln. The wax then melts off leaving a cavity into which molten metal can be poured. Cast iron was unknown in ancient times, but it was a suitable technique for bronze, copper, silver and gold. It's another technique demonstrated in many ancient examples and can produce very intricate details such as seen on many loricae. Small pieces can be relatively simple. Large castings, as in statuary, are possible, but are generally done in pieces and then soldered together. A lorica could have been cast in two pieces, front and back.

I have also worked in the lost wax method for small jewelry pieces and assisted in larger pieces for bronze-castings, but nothing as large as a lorica. Casting requires a skilled knowledge of materials and casting techniques. The item being cast needs "sprue" holes and supports to ensure a proper casting. These features produce artifacts that have to be fixed in the final product by filing, hammering or patching. Air bubbles in the molten material can cause flaws and patches and "fixes" are very common on bronze statuary. Ancient bronzes tend to have very thick cross-sections, sometimes more than a quarter of an inch. This would certainly make effective armor, but would exhaust the wearer, unless of course he was wearing it for very short periods of time for ceremonial occasions.

When discussing if armor was too heavy, too thick, too thin or too cumbersome however, we should always invoke what I like to call the "Hamblin Rule". William Hamblin is a professor of history who specializes in the military history of the crusades. I was taking a class from Professor Hamblin one day, when he introduced us to the military history and customs of Medieval West Africa. The great nations of West Africa had an elaborate tradition of bronze and iron plate armor that is simply amazing. When describing the weight of the armor, which was considerable, a girl raised her hand and asked "Wouldn't they get hot?" Professor Hamblin proceeded to explain in considerate detail how despite the high temperatures and humidity of Africa, such armor was necessary for the kinds of battles they were fighting. The girl still didn't get it and asked the question again, "yeah, but wouldn't it be TOO hot?" Hamblin made it simple for her. "Well one way you're hot, and the other way, you're dead." That's the Hamblin rule. I've never forgotten it. I am always hearing archaeologists, historians and re-enactors comment on the viability of armor as if there is some gold standard against which all armor should be judged, but there is no such scale. Some armor was undoubtedly very uncomfortable, heavy and unwieldy. The question should be not whether it was so, but whether it was better than the most probable alternative. Because or this, a lot of armor, that has been classified as "ceremonial" may well in fact have been serviceable armor. Even if the armor had been very thick, it might have been used, we simply can't say unless we have a sense of the particular environment that the person was fighting in, what he was used to and what alternatives were available to him. For this same reason we cannot rule out leather as a medium for Roman Armor.

Applique would solve the problems of armor being both too thin and too heavy. Applique consists of making small decorative pieces in three dimensions, either in repousse or in casting, and then applying them to another material, either leather, wood or plate. Applique means that a breastplate could be molded or formed from a lighter or stronger material, like leather, or steel plate. Applique could be formed in bronze or precious metals, or for that matter, carved in wood or ivory or molded in leather or gesso. Such materials would then be glued or soldered on to the final armor. We know that Romans worked in all those materials and may have used such techniques to decorate the lorica musculata. The basements and back-drawers of the archaeological collections of the world are awash in such material. A lot of it is available for sale by private collectors (unfortunately). The vast wealth of the amount of bronze applique suggests that this was a common technique. Most of this material however has been catalogued as furniture hardware or decorative items. To my knowledge no one had reviewed the expansive amount of material to see if it bears any correlation to Roman armor.

Molding involves creating an original and them making an impression from it that can be used to cast multiple copies. Intricate mold making skills in terracotta and plaster were well known to the Roman craftsmen. Molds are found in the production of ceramics. There are many surviving molds that were used to make votive figurines and pottery. Arrentine ware was an intricate form of molded pottery and many original molds survive.(scroll down to see the molds) Many of these molds have many of the same themes and forms that are seen on the lorica musculata. The question is then, did Romans, who certainly used molds to make ceramic, plaster and stucco elements, but did they use them to make molded leather, or cuir boilli, examples like this one from the 17th C.? (Incidentally, here is an artist who has made some lorica musculata in molded leather.) At the moment there are no surviving examples that clearly show that Romans were molding leather. Many of these molds and techniques used on ceramics and stucco could have been used with leather with very little difficulty, but there is no direct evidence. Instead we have to rely on the indirect representational evidence in the corpus of Roman Art to determine if Romans were using leather for armor. I believe that they were, but were probably not using it exclusively. (For more information, please see my essay: Bronze or Leather?)

As I mentioned earlier in my essay on "Bronze or Leather?", color was an important part of Roman Art and iconography, as can be seen in this example. All ancient statuary was painted and the evidence suggests that the lorica musculata was also painted. When it comes to color schemes and styles, we have very little information to go on. The Primaporta Augustus has been reconstructed with blue and red paint, but any variety of colors is possible, though red seems to be a favorite amongst re-enactors.

As far as paint technique and recipes go, there are number of options. The Romans used both tempera paints using egg or water as a binder; and wax-based or encaustic paints. Pliny has a recipe for encaustic paints in his Natural histories that has been recreated successfully. Dyes and pigments would have either been vegetable or mineral based, with rarer colors, such as purple and blue provided by rare pigments like murex or lapis lazuli. (There is also the possibility that casein paints, derived from milk, were also used, but I am still researching this.) Water-based paints were used in wall-paintings, both secco and fresco, and were probably not suitable for armor that had to move and flex and endure hostile conditions. Although, secco wall-painting, which is far less durable than true fresco, was used in Roman times even in wet climates. It all depends on the availability of materials and artists. Wax paints would have imparted a natural protection to the armor and provided a wide palette of colors from which to choose. Encaustic paint was usually mixed with some form of binder to prevent excessive melting so this is not necessarily a problem. My best guess is that they would have used wax-based paints to decorate and color the lorica musculata, but this is by no means certain. Dyed or stained leather is another possibility and Romans undoubtedly stained or dyed leather as part of the tanning process, but it is uncertain if this is the case with the musculata.