Dimensional letter techniques: choosing the right design

When you look at a sign and find the letters "beautiful" or "elegant," that feeling comes not only from the font style. It also comes from the dimensional letters, materials, how light interacts with the letter forms, and how the letters are mounted on the wall. Choosing the wrong style from the beginning will lead to one of two outcomes: a beautiful design that the workers cannot replicate, or a result that the workers can produce but does not match the design.

Three basic font styles basic

All raised letter signs can be categorized into three main technical groups, divided by how the letters receive light:

• Flat cut letters: cut from acrylic or metal sheets, with no internal cavity and no lights. This is the simplest style, suitable for indoor spaces such as lobbies, reception desks, and interior walls. A common variant is acrylic laminated with a thin metal surface: a lightweight acrylic core with a thin metal layer on the outside, giving the appearance of solid metal but lighter, reducing the load on the wall and lowering costs compared to solid cuts.
• Channel letters: each letter is a hollow box containing LED lights, with light shining out from the front through the acrylic face (known as face-lit). This is the most popular style for store facades and offices that need nighttime visibility.
• Halo-lit: still a channel letter, but with a closed face and lights shining out from the back, creating a halo effect around the letters on the wall background. This style requires a flat wall surface and the letters to be mounted a certain distance from the wall.

Choose based on lighting challenges first.

Many brand owners choose the font based on aesthetic feelings first and then think about the lighting, which is the wrong order. The first question should be: does this sign need to be clearly visible at night, and from what distance?

Materials and installation environment.

Materials not only affect aesthetics but also determine the lifespan of the sign:

• Clear or colored acrylic (mica): lightweight, easy to shape, good for bright surfaces. However, it is more brittle than metal and can scratch over time if installed outdoors without proper protection.
• Electrostatic painted aluminum: lightweight, durable, reasonably priced, suitable for most urban indoor and outdoor environments.
• Stainless steel: durable against moisture and corrosion, it is a choice worth considering for coastal areas or places with frequent water exposure. It is more expensive than aluminum but requires significantly less maintenance in the long run.

The Vietnamese accent is a separate piece

On the screen, the diacritics are attached to the letters. On dimensional letters and cut signs, each diacritic is a separate piece and must be designed as such. The construction drawings need to specify two things for each diacritic: the attachment method (foot, glue, or frame) and the distance to the letters sufficient for readability at the actual viewing distance. Drawings that do not specify the attachment method for diacritics are incomplete.

For illuminated letters, it is necessary to measure the width of the diacritic strokes against the minimum width of the box that the workshop can produce, corresponding to the type of lights used (modules or LED strips). Diacritics that do not contain lights must be decided upon in the drawings: enlarge the diacritics, create non-illuminated diacritics, or connect the diacritics to the letters with a bridge. If left to the workshop to handle during production, the results often deviate from the design intent.

Common construction mistakes

The following errors are repeated in many projects, regardless of their scale:

• Too thin strokes: a beautiful font on the screen may not retain its shape when formed, with thin strokes below a certain threshold easily bending or breaking at the feet of the letters. It is necessary to check the minimum stroke thickness suitable for the material and letter height during the design phase.
• No accounting for hiding power sources: Lightbox letters require LED power and connection wires. If a plan to hide them is not made from the beginning, the power box and wires will be unsightly and unsafe.
• Using the wrong screws and anchors: Hollow brick walls, drywall, and concrete walls require different types of anchors. Heavy raised letters using the wrong type will gradually fall over time, especially when exposed to vibrations or temperature changes.
• Use indoor glue for outdoor environments: A few seasons of sun and rain will cause peeling. Glue and bonding materials must be specified correctly for the installation environment.
• No drainage gap in box letters: Water pooling inside letter boxes damages lights and rusts frames, significantly reducing lifespan. Drainage gaps need to be designed and checked before delivery.

Drawing before production

Whether you do it yourself or hire a workshop, the technical drawings should contain all necessary information: letter depth (return), material of the letter face, mounting method, recommended type of accessories, and how each diacritic attaches. Any workshop will fill in the blanks based on their experience, not according to your brand's intent.

This article is for reference. The scope, pricing, and specific commitments of Sinh Vũ are detailed in the proposal and signed contract.